Definition of "permanent"

permanent

/ˈpɝmənənt/

adjective
comparative more permanent, superlative most permanent
1. Without end, eternal.
2. Lasting for an indefinitely long time.
noun
plural permanents
1. A chemical hair treatment imparting or removing curliness, whose effects typically last for a period of weeks; a perm.
  Quotations
  She had pewter-coloured hair set in a ruthless permanent, a hard beak and large moist eyes with the sympathetic expression of wet stones.
  1943, Raymond Chandler, The High Window, Penguin, published 2005, page 8
2. (linear algebra, combinatorics) Given an n × n matrix a i j , the sum over all permutations π of ∏ i = 1 n a i π ( i ) .
3. (collectible card games) A card whose effects persist beyond the turn on which it is played.
verb
third-person singular simple present permanents, present participle permanenting, simple past and past participle permanented
1. (transitive, dated) To perm (the hair).