Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
directionality is a noun meaning "the property of a microphone or antenna of being more sensitive in one direction than in another". It carries 2 recorded senses.
the property of a microphone or antenna of being more sensitive in one direction than in another
“the antenna received signals with no directivity”
the property of being directional or maintaining a direction
“the directionality of written English is from left to right”
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 directionality come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.