† 1. Alternateness, alteration. Obs.
1646. Sir T. Browne, Pseud. Ep., III. i. 105. In a continuall motion, without … alternity and vicissitude of rest.
1755. in Johnson; and in mod. Dicts.
2. In Welsh prosody:
1856. J. Williams, Gram. Edeyrn, § 1758. 294. What is alternity? The counterchange of vowels, and correspondency of consonants, occurring in the rhymes of the systich…. When an alternity ends in vowels not followed by consonants, the same is called semi-alternity.
