The Collaborative International Dictionary of English v.0.48:

Carom \Car"om\, n. [Prob. corrupted fr. F. carumboler to carom,
   carambolage a carom, carambole the red ball in billiards.]
   (Billiards)
   A shot in which the ball struck with the cue comes in contact
   with two or more balls on the table; a hitting of two or more
   balls with the player's ball. In England it is called
   cannon.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Carom \Car"om\, v. i. (Billiards)
   To make a carom.
   [1913 Webster]

WordNet (r) 3.0 (2006):

carom
    n 1: a glancing rebound [syn: ricochet, carom]
    2: a shot in billiards in which the cue ball contacts one object
       ball and then the other [syn: carom, cannon]
    v 1: rebound after hitting; "The car caromed off several
         lampposts"
    2: make a carom