n. & adj.
--n. (pl. -ies)
1. the product of six and ten.
2 a symbol for this (60, lx, LX).
3 (in pl.) the numbers from 60 to 69, esp. the years of a century or of a person's life.
4 a set of sixty persons or things.
--adj. that amount to sixty.
Phrases and idioms:
sixty-first, -second , etc. the ordinal numbers between sixtieth and seventieth. sixty-fourmo (pl. -os)
1. a size of book in which each leaf is one-sixty-fourth of a printing-sheet.
2 a book of this size (after DUODECIMO etc.). sixty-fourth note esp. US Mus. HEMIDEMISEMIQUAVER. sixty-four thousand (or sixty-four) dollar question a difficult and crucial question (from the top prize in a broadcast quiz show). sixty-one, -two , etc. the cardinal numbers between sixty and seventy.
Derivatives:
sixtieth adj. & n. sixtyfold adj. & adv.
Etymology: OE siextig (as SIX, -TY(2))