Syllable division and stress derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
triple-spacing is a noun meaning "typing that leaves two lines blank between lines of typing". It carries one recorded sense.
typing that leaves two lines blank between lines of typing
Definitions, synonyms and semantic relations for triple-spacing come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.