Very important; vital or crucial.

Having a broad scope; of universal application.

(idiomatic) Over an entire extent. / (idiomatic) Everywhere. / (idiomatic) In every way; thoroughly. / Used other than figuratively or idiomatically: see all over.

(idiomatic) Everywhere; covering completely.

(chiefly Britain, slang) Nothing (variant of fuck all).

(sports, games, etc.) With all players or teams having the same score; tied, drawn.

Emphatically yes; certainly; definitely. / Used other than figuratively or idiomatically: see by, all, means.

Of all time; unsurpassed up to the present time.

(idiomatic) With everything included, counted, or summed; in total.

Having knowledge of all things said or done.