Vocabulary
C1
6 min read
Updated 15 June 2026
Quick Answer
Continuous describes something with no gap or interruption in time or space: a continuous line, continuous rain for three days. Contiguous describes things that touch or share a boundary: the contiguous states, two contiguous fields. Continuous is about being unbroken; contiguous is about being adjacent. They look similar but are not interchangeable.
Continuous and contiguous sit close together in the dictionary and share a Latin root meaning “to touch,” which is why they confuse readers. But they have drifted apart in modern English. Continuous stresses the lack of a break — the thing keeps going. Contiguous stresses physical contact — the things sit next to each other. One is about uninterrupted flow; the other is about shared edges.
At a Glance: Continuous vs Contiguous
| Word | Part of Speech | Pronunciation | Core Meaning |
|---|
| continuous |
adjective |
/kənˈtɪnjuəs/ |
unbroken; without interruption in time or space |
| contiguous |
adjective |
/kənˈtɪgjuəs/ |
touching; sharing a common border; adjacent |
Using “Continuous”
Continuous means going on without stopping or without any gaps. It applies to time (an unbroken stretch of hours or days) and to space or material (an unbroken line or surface). It is one of the most common adjectives in English and gives us the adverb continuously.
When to use it
- Unbroken in time: continuous rainfall, continuous improvement
- Unbroken in space or material: a continuous wall of glass
- Grammar term: the continuous (progressive) tenses, e.g. is running
- Contrast with continual (repeated, with breaks)
- Related words: continuously, continuity, continue
The factory runs in continuous operation, day and night.
A continuous white line means you must not overtake.
We have seen continuous growth for ten straight quarters.
The hum of the machine was low but continuous.
The hedge forms a continuous barrier around the field.
Using “Contiguous”
Contiguous means touching, or sharing a common boundary. It is more formal and technical, often used for land, regions, or areas that sit directly next to one another with no gap between them. The famous example is the contiguous United States — the 48 states that touch each other, excluding Alaska and Hawaii.
When to use it
- Areas sharing a border: the contiguous 48 states
- Things physically touching: two contiguous rooms, contiguous plots of land
- Technical/legal land descriptions: contiguous parcels
- Sequences placed next to each other: contiguous memory blocks (computing)
- Related word: contiguity (the state of touching)
Canada and the United States are contiguous countries.
The hotel bought the two contiguous buildings next door.
Their farm consists of three contiguous fields.
The program stores the data in contiguous memory.
France and Spain occupy contiguous territory in Europe.
The Key Difference
Ask what the word is really claiming. Continuous claims there is no break — the thing keeps going without stopping (a continuous noise never pauses). Contiguous claims things touch — they share an edge or border (contiguous countries meet along a frontier). A single object can be continuous (an unbroken line); you need at least two things for them to be contiguous (they must touch each other).
Memory Tip
Continuous contains nu as in nonstop — it never stops. Contiguous hides g for geography — it is about places sharing borders on a map. If it is about time with no gaps, use continuous; if it is about areas that touch, use contiguous.
Common Mistakes
The 48 continuous states exclude Alaska and Hawaii.
The 48 contiguous states exclude Alaska and Hawaii. (sharing borders is contiguous)
It rained in a contiguous downpour all afternoon.
It rained in a continuous downpour all afternoon. (unbroken in time is continuous)
Our two gardens are continuous, divided only by a fence.
Our two gardens are contiguous, divided only by a fence. (two areas that touch are contiguous)
We need contiguous power with no outages.
We need continuous power with no outages. (power without breaks is continuous)
Frequently Asked Questions
What is the difference between continuous and contiguous?
Continuous means without a break or interruption, in either time or space: continuous rain, a continuous line. Contiguous means touching or sharing a common border: contiguous countries, two contiguous fields. The key difference is that continuous describes something that is unbroken, while contiguous describes things that are next to each other. A single object can be continuous, but you need at least two things for them to be contiguous, because they must touch each other along an edge.
What does 'contiguous United States' mean?
The contiguous United States, sometimes called the lower 48, refers to the 48 states that share land borders and form one connected block on the map, plus the District of Columbia. It excludes Alaska and Hawaii, which do not touch the other states. The word contiguous is used because these states are adjacent to one another. You would not call them the continuous states, because continuous is about having no break in time, not about sharing borders.
How do you pronounce continuous and contiguous?
Continuous is pronounced /kənˈtɪnjuəs/, with the middle sounding like nyoo (con-TIN-yoo-us). Contiguous is pronounced /kənˈtɪgjuəs/, with a hard g in the middle (con-TIG-yoo-us). The difference in sound is the n-y in continuous versus the g-y in contiguous. Saying them slowly and listening for that middle consonant is a reliable way to keep them apart, since the rest of the word sounds almost identical.
Can a single thing be contiguous?
Not really on its own. Contiguous describes a relationship of touching between two or more things, so it usually appears with a plural or with a phrase like contiguous to or contiguous with: the two plots are contiguous; this field is contiguous with ours. By contrast, a single thing can easily be continuous, because continuous just means it has no internal break: a continuous line, a continuous tone. So one object can be continuous, but contiguity needs neighbours.
Is contiguous a formal word?
Yes, contiguous is fairly formal and technical. It appears most often in geography (contiguous countries), law and property (contiguous parcels of land), and computing (contiguous memory). In everyday conversation, people are more likely to say next to each other, touching, or adjacent. Continuous, on the other hand, is a common everyday word used freely in ordinary speech and writing, such as continuous rain or continuous effort. So contiguous signals a more technical register than continuous.
What is the difference between contiguous and adjacent?
Adjacent and contiguous are close in meaning, and both describe things that are near or next to each other. The main nuance is that contiguous stresses actually touching or sharing a boundary, whereas adjacent can sometimes allow a small gap, such as adjacent seats with an aisle between them. In practice the words overlap heavily and are often interchangeable. Adjacent is the more everyday word, while contiguous sounds more technical and emphasises a shared edge.
Is it continuous or continual?
That depends on whether there are breaks. Continuous means without any break at all: continuous rain fell for three days without stopping. Continual means repeated, with breaks in between: continual interruptions during the meeting means they kept happening again and again. So if something truly never pauses, use continuous; if it happens repeatedly with gaps, use continual. This is a separate confusion from contiguous, which is about things touching rather than about time.
What does contiguous mean in computing?
In computing, contiguous memory means a single, unbroken block of memory addresses placed directly next to one another, with nothing in between. Storing data in contiguous memory can make it faster to read because the system does not have to jump around. Here contiguous keeps its core meaning of adjacent and touching, applied to memory locations. Note that this is different from continuous, which would imply something with no break in time rather than blocks sitting side by side.
Can contiguous describe time?
Usually not in everyday English. Contiguous mostly describes things touching in space, such as land or areas. When people talk about time without breaks, they normally use continuous: a continuous period of employment. Occasionally, in technical or legal writing, you might see contiguous days meaning days that follow one another directly, but this is unusual. For most purposes, if you are describing an unbroken stretch of time, the natural and correct choice is continuous, not contiguous.
Do continuous and contiguous share a root?
Yes, both come from the Latin verb meaning to touch or hold together, which is why they look so alike. Over time, English split their meanings: continuous developed the sense of unbroken in time or space, while contiguous kept closer to the original idea of physically touching or bordering. Knowing they share a root explains the confusion, but in modern usage they are not interchangeable, so you still have to choose the one that matches your meaning.
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