Alternative form of feel ten feet tall

(aviation) An aerobatic maneuver consisting of 1/4 looping up, wingover (left or right), 1/2 looping down+up, wingover (right or left), 1/4 looping down. / The symbol ∞ or anything of the same shape.

(sports) A quarterfinal; the players in a quarterfinal

(historical) The conflict in the Low Countries against Spanish rule, from 1568 to 1648, that gradually turned into a Dutch war of independence.

(music) a rest that has the same length as an eighth note

plural of eighth rest

Regardless of what happens (out of two possible situations).

(nonstandard) eighty-first

(basketball, US, informal) The eight teams participating in the regional finals of the NCAA Division I tournament, one of whom will become the national champion.

Describing a situation in which there are only two choices. / Describing a situation in which there is a choice between two different plans of action, but both together are not possible