a. [f. prec. + -AL.] Of the nature of or belonging to a chasm.
1872. Howells, Their Wedd. Journ., 260. Any commanding point was sufficiently chasmal and precipitous.
1882. A. B. Blake, in Harpers Mag., Feb., 351/1. A chasmal difference exists between Orleanists, Legitimists, Bonapartists, and the Opportunist government.