Source : Webster's Revised Unabridged Dictionary (1913)

Affirmant \Af*firm"ant\ ([a^]f*f[~e]rm"ant), n. [L. affirmans,
   -antis, p. pr. See {Affirm}.]
   1. One who affirms or asserts.

   2. (Law) One who affirms, instead of taking an oath.