To announce or record one's own arrival at a hotel, airport etc.
To verify a person's information and record their arrival, such as at a hotel, airport, etc.
To integrate new revisions into the public or master version of a file in a version control system.
To visit in order to see how someone is doing.
To contact another person in order to keep the other person informed of one's situation.
To return (a book to a library, source code to a repository, etc.).
To enter solitary confinement at one's own request for protection from other prisoners.
To send somebody to solitary confinement; to make somebody be admitted to solitary confinement.
To show up; to appear suddenly or unexpectedly.
To cause to appear; to find by searching, etc.
To increase the amount of something by means of a control, such as the volume, heat, or light.
To reposition by rotating, flipping, etc. upwards.
To party hard, especially when involving alcohol or drugs.
To belay or make fast a line on a cleat or pin.