(Internet) To read someone's message or messages and not give any response, particularly on an instant messaging application where a user can see whether or not their interlocutor has read their message.

Third-person singular simple present indicative form of leave someone cold

To be unsatisfactory; to fail to meet minimal standards of acceptability.

Don't touch a plant with a cluster of three leaves because it might be poison ivy or poison oak.

In the armed forces, being absent from one's post without prior authorization.

(military) Failing to return from leave or liberty on time.

The military offense of not being present when expected without proper authority.

present participle of leave one's stamp

Third-person singular simple present indicative form of leave one's stamp

Synonym of put one's stamp.