The Collaborative International Dictionary of English v.0.48:

Committal \Com*mit"tal\, n.
   The act of committing, or the state of being committed;
   commitment.
   [1913 Webster]

WordNet (r) 3.0 (2006):

committal
    n 1: the official act of consigning a person to confinement (as
         in a prison or mental hospital) [syn: commitment,
         committal, consignment]
    2: the act of committing a crime [syn: perpetration,
       commission, committal]