(historical) One hundred and twenty (120), 12 × 10.

Having existed for a long time. / Having been done for long enough time to become convention.

(idiomatic) Long ago; in the (distant) past.

Having long, uncut hair on the head. / Of animals: having fur with long hairs.

plural of long hundred

plural of long dozen

plural of long thousand

Very long; about a yard in length.

At a time in the past, especially the distant past.

Existing in the relatively distant past.