Quick answer: When used as verbs meaning to become smaller, contract is more formal and scientific (metals contract in cold temperatures; the economy contracted), while shrink is more everyday and often implies a change in fabric or materials due to washing or heat (My jumper shrunk in the wash.). Contract also has a completely different meaning as a noun: a legal agreement. Remember: CONTRACT (verb) = become smaller (formal/scientific); SHRINK = become smaller (everyday, often fabric/materials); CONTRACT (noun) = legal agreement. For a fuller definition, see the Cambridge Dictionary entry for ‘contract’.
Comparison Table
| Word | Part of Speech | Meaning | Example |
|---|---|---|---|
| contract | verb / noun | (v) to become smaller; to make a legal agreement; (n) a legal document | Muscles contract when stimulated. |
| shrink | verb | to become smaller, especially due to heat, moisture, or washing; to draw back | My shirt shrunk in the dryer. |
Using Contract (Verb)
When contract is used as a verb meaning to become smaller, it is most common in scientific, economic, and formal contexts. It often describes measurable, physical reduction.
Metals contract when they cool down.
The economy contracted by 2% in the third quarter.
The pupil of the eye contracts in bright light.
Muscles contract and relax during exercise.
Contract also means to catch an illness (especially in formal or medical language): He contracted malaria. And it means to enter into a legal agreement: The company contracted a supplier to deliver materials.
Using Shrink
Shrink is more everyday and versatile. It describes materials (especially fabric) becoming smaller due to washing, heat, or moisture. It also describes things becoming less in scope, and figuratively, people drawing back in fear or discomfort.
My favourite jumper shrunk in the wash.
The workforce has shrunk by 30% over the past decade.
She shrank back from the aggressive dog.
The tumour shrank after treatment.
Note: the past tense of shrink is either shrank (British English standard) or shrunk (increasingly common in both varieties). The past participle is shrunk: It has shrunk.
Shrink as a Noun (Informal)
Informally, a shrink is a psychiatrist or psychotherapist. This is slang and has nothing to do with the verb meaning to become smaller.
Contract as a Noun
As a noun (stressed on the first syllable: CON-tract), contract means a legally binding agreement between two or more parties:
She signed a two-year contract with the club.
The contract specifies payment terms.
This meaning of contract has nothing in common with shrink.
When Both Are Possible
In economic and business contexts, both contract and shrink can describe a reduction:
The market contracted sharply. (formal/economic)
The market shrank sharply. (also correct, slightly more informal)
Memory Tip
CONTRACT → think of a contract (document): something precise, formal, legal.
SHRINK → think of a shrunken jumper: everyday, physical reduction due to heat.
Common Mistakes
✗ GDP shrank by 1.5% in the first quarter. (acceptable but informal)
✓ GDP contracted by 1.5% in the first quarter. (standard in economic writing)
✗ Pronouncing the noun as con-TRACT (like the verb)
✓ The noun CON-tract has stress on the first syllable; the verb con-TRACT has stress on the second.
✗ The economy has shrank.
✓ The economy has shrunk. (past participle after “has”)
Note: Use shrank for simple past (“It shrank”) and shrunk for perfect forms (“It has shrunk”).
Also confusing: Generate vs Produce, Establish vs Found, Accept vs Except. Browse all confusing word pairs →
Quick Check: Contract or Shrink?
Four questions — choose the correct word for each sentence.
1. “My woollen jumper ___ in the hot wash.”
2. “Muscles ___ when stimulated by the nervous system.”
3. “She signed a two-year ___ with the club.”
4. “The economy has ___ for three consecutive quarters.”
Frequently Asked Questions
What is the difference between contract and shrink?
As verbs meaning to become smaller, contract is more formal and scientific (metals contract in cold; the economy contracted), while shrink is more everyday and often refers to fabric or materials becoming smaller due to heat or moisture. Contract also means to enter into a legal agreement, and as a noun it is a legal document. Shrink has no legal meaning.
Can contract and shrink be used interchangeably?
In economic contexts, both can describe a reduction: “The economy contracted/shrank.” In scientific writing, contract is strongly preferred. For fabric and clothing, shrink is the only natural choice: “My shirt shrank” (not contracted). For legal documents and medical usage, only contract applies.
What is the past tense of shrink?
The simple past tense of shrink is shrank (standard in both British and American English): “The jumper shrank in the wash.” Shrunk is also used informally as a simple past, especially in American English, but is the standard past participle: “It has shrunk.” Using “shrunken” as a predicate adjective is also correct: “a shrunken head.”
What does contract mean as a noun?
As a noun (CON-tract, stressed on the first syllable), a contract is a legally binding agreement between two or more parties, setting out rights and obligations: a work contract, an employment contract, a building contract. This meaning is completely separate from the verb meaning to become smaller. Shrink has no equivalent noun meaning.
What does “contract an illness” mean?
“Contract an illness” means to catch or develop a disease, usually in formal or medical language: “He contracted pneumonia during the winter.” This is a formal alternative to “catch” or “develop.” You would not say “shrink an illness.” This usage of contract is unrelated to the meaning of becoming smaller.
What does “a shrink” mean as a noun?
Informally, a shrink is a psychiatrist or psychotherapist. The term is slang, originally shortened from “headshrinker,” and is used in casual speech: “She has been seeing a shrink.” This usage is unrelated to the verb meaning to become smaller. It should be avoided in formal writing.
What does “shrink-wrap” mean?
Shrink-wrap is a plastic film used to seal products by applying heat, which causes the film to shrink tightly around the object. It is used for packaging food, CDs, software, and many other products. The word directly uses the verb sense of shrink: the film shrinks when heated. Contract-wrap is not a term.
How do contract and shrink appear in economic news?
In economic journalism and official reports, contract is the formal and standard term: “The UK economy contracted by 0.3% in January.” Shrink is also used, especially in headlines: “Economy shrinks for second quarter.” Both are correct, but contract is preferred in official statistical reports, academic economics, and central bank communications.
What are common collocations with contract (verb)?
Common collocations: contract a disease/illness, contract a muscle, the economy contracts, metals contract (in cold), pupils contract (in light), contract out (to outsource work to a third party). Note that “contract out” means to hire an outside firm or freelancer to do work under a contract — another specific meaning unique to contract.
What are common collocations with shrink?
Common collocations: shrink in the wash, shrink-wrap, shrink from (to avoid out of fear or reluctance: “He shrank from responsibility”), the workforce shrinks, a shrinking market, shrink-proof fabric, the tumour shrank. In informal language: “Don’t shrink from a challenge” means don’t back away from it.