Entry 2 senses Webster, 1913 Long-sightedness · Long·-sight·ed·ness · IPA 01 n. The state or condition of being long-sighted; hence, sagacity; shrewdness. 1. The state or condition of being long-sighted; hence, sagacity; shrewdness. 2. See Hypermetropia.(Med.) See: Hypermetropia