Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
acrostic is a noun meaning "a puzzle where you fill a square grid with words reading the same down as across". It carries 2 recorded senses.
a puzzle where you fill a square grid with words reading the same down as across
verse in which certain letters such as the first in each line form a word or message
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 acrostic come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.