Entry 1 sense Webster, 1913 Reciprocalness /(rē̇*sĭp"rō̇*kal*nĕs)/ · Re·cip·ro·cal·ness · IPA 01 n. The quality or condition of being reciprocal; mutual return; alternateness. 1. The quality or condition of being reciprocal; mutual return; alternateness.