\Pro*ces"sion*al\, a.
Of or pertaining to a procession; consisting in a procession.
      The processional services became more frequent.
                                               --Milman.

\Pro*ces"sion*al\, n. [F. processionnal, LL.
processionale.]
1. (R. C. Ch.) A service book relating to ecclesiastical
   processions. --J. Gregory.
2. A hymn, or other selection, sung during a church
   procession; as, the processional was the 202d hymn.