(idiomatic, often followed by to) To try to remember a particular time or event; to think about something in the past.

(aviation) The phenomenon whereby rolling an aircraft to start a turn in one direction increases the drag on the upgoing wing on the outside of the turn, creating a tendency (especially at low airs...

The current holder of an office, such as ecclesiastical benefice or an elected office.

(chiefly historical) An electronic device incorporating electrons from a glowing cathode inside an evacuated glass tube, functioning as a switch, amplifier etc.