Definition of past one's prime
- The dog was past his prime.
- As a singer, he is past his prime.
: just gone or elapsed
: having existed or taken place in a period before the present : bygone
: beyond the age for or of
: at the farther side of : beyond
: time gone by
: something that happened or was done in the past
: the past tense of a language
: so as to reach and go beyond a point near at hand
: the second of the canonical hours
: the first hour of the day usually considered either as 6 a.m. or the hour of sunrise
: the earliest stage
: first in time : original
: of, relating to, or being a prime number — compare relatively prime
: having no polynomial factors other than itself and no monomial factors other than 1
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