(idiomatic) sinking or swimming; all or nothing

a (single) branch of flowers / a (single) cloud

a bath (a single instance of taking a bath)

To stop overnight, to stay for one night

An overnight stay, one night's lodging

full-fledged, qualified, up to standard / adulthood, behaving like an adult or as a member of the society / Used other than figuratively or idiomatically: see 一人, 前. ("one person's portion")

a (single) meal / a (single) bowl of rice

One slice or cut of something.

a (single) leaf / (figuratively) a (single) small boat / a (single) sheet (something thin: page, etc.)

a (single) blast of air (wind, etc.)