(obsolete, Britain, idiomatic) Nearly, very near.

plural of ace boon coon

(US, slang) A close friend.

(simile) Utterly black; pitch-black.

(gambling) A loaded die fashioned so that the numbers 1 and 6 come up more frequently than others.

plural of six-ace flat

(idiomatic) A surprise advantage of which others are not aware.

Turning sour; readily becoming tart or acid; slightly sour.

A substance liable to become sour.

The quality of being acescent; the process of acetous fermentation; a moderate degree of sourness.