(aviation, travel) The amount of time, agreed in advance between airlines and airport authorities, that is considered sufficient for a passenger to make a connection between an arriving flight and a departing flight on the same ticket.

(Britain) A time signal transmitted on radio by the BBC every hour and consisting of five short beeps followed by a longer one, with the longer one coinciding with the start of the hour.

Mean solar time at the Greenwich Meridian.

The amount of time within which a business process must be restored after a disruption in order to avoid unacceptable consequences.

A chronological scale of the earth's history used to measure the relative or absolute age of any part of geologic time.

(idiomatic) To acknowledge someone; to give someone respect or attention; to tip one's hat

(idiomatic) I (or we) have not seen you for a long time.

(idiomatic) To remain useful or valued over a long period of time; to last a long time.

(cricket) a batsman who has limited bowling ability; asked to bowl under special circumstances

(idiomatic) To enjoy oneself greatly.