n. 25B6; verb they were napping on the sofa : DOZE, sleep (lightly), take a nap, catnap, rest, take a siesta; informal snooze, snatch forty winks, get some shut-eye; Brit. informal have a kip, get some zizz; N. Amer. informal catch some Zs, catch a few Zs.
25B6; noun she is taking a nap : (LIGHT) SLEEP, catnap, siesta, doze, lie-down, rest; informal snooze, forty winks, shut-eye; Brit. informal kip, zizz.
25A0; catch someone napping CATCH OFF GUARD, catch unawares, (take by) surprise, catch out, find unprepared; informal catch someone with their trousers/pants down; Brit. informal catch on the hop.