A long time ago; at some time in the past (a traditional beginning of children's stories, especially fairy tales).

Now is an appropriate time to take a particular action.

(idiomatic) To become successful and widely known.

(Britain) A form of daylight-saving time, one hour ahead of UTC, used in the United Kingdom. Abbreviation: BST

Slowly and steadily, without rushing.

A person purchasing a house for the first time, as opposed to one who already owns a house and is selling it in order to buy another. / A person who purchases something for the first time.

(medicine) A test used to assess the ability of a person's blood to clot, carried out by cutting the skin and measuring the time it takes for the resulting bleeding to stop.

(US, dated derogatory slang, sometimes reclaimed) A notional system of time (or time zone) which others sometimes derogatorily ascribe to African Americans, and which they sometimes jocularly ascribe to themselves, to account for their supposed tendency to be tardy.

The primary time standard by which the world regulates clocks and time. / A high-precision atomic time standard.

The practice in some places of adjusting clocks forward in the spring and back in the fall, usually by one hour, so that the adjustment causes the time to coincide with the greatest period of illumination by the sun over the course of the day.