ready-made

Short definition from Wiktionary

Adjective

1. 1
   Preexisting or made previously and suitable for use without further preparation or modification; comparable with regard to the amount of preparation required.
2. 2
   Made in advance to a standard specification.
3. 3
   Made or prepared in advance and used regularly or habitually without original thought.

Noun

1. 1
   A ready-made object.
2. 2
   Synonym of found object.