the lowest non-commissioned rank for a man in the Royal Air Force; abbreviated A.C., A/C.
aircraftman; cf. S.A.C. n. at S, n.1 initialisms 1.
An aircraftman, esp. an A.C.2.
the lowest non-commissioned rank for a woman in the Royal Air Force; abbreviated A.C.W.
In full A.C. Plonk. An aircraftman of the lowest rank.
aircraftwoman; cf. S.A.C.W. n. at S, n.1 initialisms 1.