[Achilles' heel] {n. phr.}, {literary} A physical or psychological weakness named […]

[acid head] {n.}, {slang} A regular user of LSD on whom […]

[acid rock] {n.}, {slang} A characteristic kind of rock in which […]

[acorn] See: [GREAT OAKS FROM LITTLE ACORNS GROW].

[acoustic perfume] {n.}, {slang} Sound for covering up unwanted noise, such […]

[acquire a taste for] {v. phr.} To become fond of something; […]

[across the board] {adv. phr.} 1. So that equal amounts of […]

[across the tracks] See: [THE TRACKS].

[act] See: [READ THE RIOT ACT].

[act high and mighty] {v. phr.} To wield power; act overbearingly; […]