Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
overleaf is an adverb meaning "on or to the other side of a page". It carries one recorded sense.
on or to the other side of a page
“data tabulated overleaf”
Definitions, synonyms and semantic relations for overleaf come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.