As a Noun: 1. Three or more lengths of hair twisted over and under each other to make one thick length. English = plait. American English = braid. As a Verb or Adjective: 1. To twist three or more lengths of hair twisted over and under each other to make one thick length. English = plait. American English = braid. 2. Of lengths of hair, to be twisted over and under each other to make one thick length. English = (be) plaited. American English = (be) braided. 3. To wear your hair in plaits or braids.