check

If you check something, you look at it to see if there is a problem, or something new or different.

Example: Hi, I heard some noises, so I'm just checking to see if you were O.K.

If you check something out, you look at it because it might be interesting.

Example: I found this great video online. Check it out.

If you check an answer, or choice, you make a check mark (✓) beside it.

Example: If you want to get mail from us, check the box at the bottom of the page.

If you check out of a hotel, you pay your bill and leave.

Example: I called the hotel, but they said you had already checked out.

If you check in to a hotel, you go to the front desk to tell them you've arrived and you get your key.

Example: After we checked in, we went to our room and unpacked our bags.