The phrasal verb “check in” is predominantly used in informal contexts but can also appear in semi-formal or professional settings, especially when referring to travel or accommodations. It generally refers to the process of registering one's arrival at a hotel, airport, or other location, and therefore is most commonly used in travel and hospitality contexts. In addition to this literal meaning, “check in” is also used metaphorically to indicate a brief update or communication to confirm status or progress, such as checking in with a supervisor or colleague in a workplace. This informal use is common in both personal and professional communication, underscoring its versatility. The verb is commonly paired with personal or reflexive pronouns and is often followed by a preposition or location, such as "check in at the hotel" or "check in with them." It is widely understood and used in both spoken and written English, enhancing its utility across various scenarios.
B1
PreIntermediate
1. To register one's arrival at a hotel, airport, or other accommodation.
We will check in at the hotel around 3 PM.
Please make sure to check in at least two hours before your flight.
2. To communicate or report one's status or progress, often informally.
I'll check in with you later to see how the meeting went.
She checks in every now and then to update us about her travels.