General English

General Science

  • noun the highest point on the top of an object
  • noun the white top of a wave


  • noun a growth on the head of a bird or other animal

Cars & Driving

  • noun the highest point of a screw thread.


  • The maximum instantaneous value of a voltage, current, signal, or other quantity.
  • The maximum instantaneous absolute value of the displacement from a reference position, such as zero, for a voltage, current, signal, or other quantity. When referring to a wave or other periodic phenomenon, also called amplitude.
  • The crest (1), or crest (2) for a given time interval.


  • noun a long raised part on a bone

Origin & History of “crest”

The original etymological meaning of crest appears to have been ‘tuft of hair’. It comes via Old French creste from Latin crista ‘tuft, plume’, which may be related to Latin crīnis ‘hair’ (source of the English biological term crinite ‘hairy’ (16th c.)). If so, crest belongs to the same word family as crinoline. The notion of crest as a ‘surmounting ridge’ is a secondary semantic development, which may have given rise to the word crease.