Ra′tion‐al″i‐ty (–ăl″ĭ‐ty̆; 277), n.; pl.-ties (–tĭz). [F. rationalité, or L. rationalitas.] The quality or state of being rational; agreement with reason; possession of reason; due exercise of reason; reasonableness.
When God has made rationality the common portion of mankind, how came it to be thy inclosure? Gov. of Tongue.
Well-directed intentions, whose rationalities will never bear a rigid examination. Sir T. Browne.