Quick Definition
Check In — To register your arrival at a hotel, airport, or event; to contact someone briefly to give or receive an update.
Meanings of Check In
| Meaning | Example Sentence | Notes / Explanation |
|---|---|---|
| Register at hotel/airport | We need to check in at 2 p.m. | Standard travel/hospitality meaning. |
| Register at an event | Please check in at reception when you arrive. | Showing your name is on a list. |
| Contact for update (informal) | I'll check in with you later this week. | Brief contact to share progress or see how someone is. |
Example Sentences
| Sentence | Meaning in Context |
|---|---|
| We checked in to the hotel at midnight. | Registered arrival at the hotel late at night. |
| Online check-in opens 24 hours before your flight. | Noun form: airport registration process. |
| She checked in at the conference desk and got her badge. | Registered attendance at a conference. |
| My manager checks in with the team every Monday. | Makes brief contact regularly for updates. |
| You must check in two hours before departure. | Airport instruction to register on time. |
| He checked in on social media from the restaurant. | Used the location check-in feature on social media. |
| I checked in with the doctor to report how I was feeling. | Brief contact to update a healthcare professional. |
Grammar Notes
Separability & Transitivity
Type: Inseparable | Transitivity: Intransitive (most uses) / Transitive (luggage context)
Intransitive (most common): No object — We checked in. Check in at the desk.
Transitive (airport): You can check in luggage — check in your bags. Here the particle is inseparable; the object follows.
Preposition use: check in at (a place) / check in with (a person) / check in on (someone's wellbeing).
How to Use Check In
"Check in" works across formal, professional, and casual contexts. The meaning is determined largely by the preposition or context that follows.
| Register | Example / Notes |
|---|---|
| Formal / Travel | Passengers must check in at Gate 12 no later than 10:30. |
| Professional / Workplace | I'd like to check in with you about the project status. |
| Informal / Spoken | I'll check in later, okay? |
| Social Media | She checked in at the Eiffel Tower. (location tag) |
Similar Phrasal Verbs
Practise Check In
Practice English Phrasal Verbs
Use these exercises to master phrasal verbs in context:
Frequently Asked Questions about Check In
What does "check in" mean?
"Check in" means to register your arrival at a hotel, airport, or event, or to briefly contact someone to give or receive an update. It is an inseparable, mainly intransitive phrasal verb at CEFR A2.
Is "check in" separable or inseparable?
"Check in" is inseparable. It is usually intransitive (no object): We checked in. When used transitively with luggage, the object still follows: check in your bags, never check your bags in (in standard usage).
How do I use "check in" in a sentence?
We need to check in at the hotel before 3 p.m. (travel) or I'll check in with you tomorrow morning. (workplace update). Use "at" for places and "with" for people.
What is the register of "check in"?
"Check in" is neutral. The travel meaning is standard in formal and informal contexts. The 'contact for update' meaning is common in professional workplace English.
What CEFR level is "check in"?
"Check in" is an A2 — Elementary phrasal verb. Learners encounter it early in travel and daily routine vocabulary. The workplace meaning is more B1 in context.
What is the difference between "check in" and "check out"?
"Check in" means to arrive and register. "Check out" means to leave and settle the bill. They are direct opposites: you check in when you arrive and check out when you leave a hotel or airport.
Can "check in" be used formally?
Yes. In business English, I will check in with the team on Monday is standard professional usage meaning to briefly contact or update colleagues.
Does "check in" take an object?
"Check in" is mostly intransitive — no direct object. You check in at a place or with a person. In the airport/baggage context it can be used transitively: check in your luggage.
How can I practise "check in"?
Use LexFizz's Flip Tiles and Find the Match to practise "check in" in travel and workplace contexts. Try to practise both meanings to recognise them quickly.
Is "check in" used differently in British and American English?
"Check in" is used identically in both varieties. In American English "check in on someone" (to see how they are doing) is very common in casual speech and social media; British English uses this pattern too.