Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class V. Words Releasing to the Voluntary Powers
Division (I) Individual Volition
Section II. Prospective Volition
2. Degree of Subservience

650. Perfection.

   NOUN:PERFECTION; perfectness &c. adj.; indefectibility; impeccancy, impeccability.
  PARAGON, pink, beau ideal [F.]; pink -, acme- of perfection; ne plus ultra [L.]; summit [See Summit].
  [COMPARISONS] cygne noir [F.]; Phœnix or Phenix; black tulip, tulipe noir [F.]; philosopher’s stone; Koh-i-noor.
  MODEL, standard, pattern, mirror, Admirable Crichton; trump, brick, corker, caution, humdinger [all slang]; “the observed of all observers” [Hamlet], very prince of.
  Bayard, chevalier sans peur et sans reproche [F.]; Roland, Sidney.
  MASTERPIECE, masterstroke, prizewinner, prize; superexcellence (goodness) [See Goodness]; transcendence (superiority) [See Superiority].
   VERB:BE PERFECT &c. adj.; transcend (be supreme) [See Superiority].
  PERFECT, bring to perfection, ripen, mature; consummate, crown, put the finishing touch to (or upon); complete [See Completion]; put in trim (prepare) [See Preparation]; maturate [rare].
   ADJECTIVE:PERFECT, faultless; indefective [rare], indeficient [rare], indefectible; immaculate, spotless, impeccable; free from imperfection [See Imperfection]; unblemished, uninjured [See Deterioration]; sound, – as a roach; in perfect condition; scathless [obs. or dial.], scatheless, intact, harmless; seaworthy (safe) [See Utility]; right as a trivet; in seipso totus teres atque rotundus [Hor.]; consummate (complete) [See Completeness]; finished [See Completion]; complete in itself; well-rounded.
  BEST (good) [See Goodness]; model, standard; inimitable, unparagoned [rare], unparalleled (supreme) [See Superiority]; superhuman, divine; beyond all praise (approbation) [See Approbation]; sans peur et sans reproche [F.].
   ADVERB:TO PERFECTION; perfectly &c. adj.; ad unguem [L.]; clean, – as a whistle; with a finish; to the limit.
  1. Let us go on unto perfection.—Hebrews vi, 1
  2. The perfection of art is to conceal art.—Quintilian
  3. The glass of fashion and the mould of form.—Hamlet