Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
sharp-sightedness is a noun meaning "sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)". It carries 2 recorded senses.
sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)
lively attentiveness
Definitions, synonyms and semantic relations for sharp-sightedness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.