Merriam-Webster Collegiate Dictionary - dub

 I. transitive verb  (~bed; ~bing)  Etymology: Middle English ~ben, from Old English ~bian; akin to Old Norse ~ba to ~, Old High German tubili plug  Date: before 12th century  1.  a. to confer knighthood on  b. to call by a distinctive title, epithet, or nickname  2. to trim or remove the comb and wattles of  3.  a. to hit (a golf ball or shot) poorly  b. to execute poorly a ~bed attempt  • ~ber noun  II. noun  Date: 1884 one who is inept or clumsy  III. noun  Etymology: Middle English (Scots) ~be  Date: 15th century chiefly Scottish pool, puddle  IV. transitive verb  (~bed; ~bing)  Etymology: by shortening & alteration from double  Date: 1930  1. to add (sound effects or new dialogue) to a film or to a radio or television production — usually used with in  2. to provide (a motion-picture film) with a new sound track and especially dialogue in a different language  3. to make a new recording of (sound or videotape already recorded); also to mix (recorded sound or videotape from different sources) into a single recording  • ~ber noun  V. noun  Date: 1974 Jamaican popular music in which audio effects and spoken or chanted words are imposed on an instrumental reggae background