Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
preassemble is a verb meaning "to manufacture sections of (a building), especially in a factory, so that they can be easily transported to and rapidly assembled on a building site of buildings". It carries one recorded sense.
to manufacture sections of (a building), especially in a factory, so that they can be easily transported to and rapidly assembled on a building site of buildings
construction
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for preassemble come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.