an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a fool or simpleton; ninny.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
whenever; as soon as: Once you're finished, you can leave.
noun
8.
a single occasion; one time only: Once is enough.
Idioms
9.
all at once,
a.
simultaneously: The children were running, screaming, and throwing things all at once.
b.
suddenly: All at once the rain came down.
10.
at once,
a.
at the same time; simultaneously: Don't all speak at once.
b.
immediately; promptly: Tell him to come at once!
11.
once and again, repeatedly: He has been told once and again not to slam the door.
12.
once and for all, decisively; finally: Let's settle this problem once and for all.Also, once for all.
13.
once in a while, at intervals; occasionally: She stops in to see us once in a while.
14.
once or twice, a very few times; infrequently: I've seen her in the elevator once or twice.
15.
once upon a time, at some unspecified past time, especially a long time ago: Once upon a time, in a faraway land, there lived a prince and princess.
Origin: before 1150;Middle Englishones,Old Englishānes, orig. genitive of ānone; replacing Middle Englishenes,Old Englishǣnes once, equivalent to ǣne once (orig. instrumental of ān) + -es adv. suffix; see -s1
c.1200, anes, from ane "one" + adverbial genitive. Replaced O.E. æne. Spelling changed as pronunciation shifted from two syllables to one after c.1300. Pronunciation change to "wuns" parallels that of one. As an emphatic, meaning "once and for all," it is attested from
c.1300, but this now is regarded as a Pennsylvania German dialect formation. Meaning "in a past time" (but not necessarily just one time) is from c.1250. Once upon a time as the beginning of a story is recorded from 1595. Slang once-over "inspection" is from 1915. At once originally (c.1230) meant "simultaneously," later "in one company" (c.1300), and preserved the sense of "one" in the word; the phrase typically appeared as one word, atones; the modern meaning "immediately" is attested from 1531.