Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
day-after-day is an adjective meaning "of or belonging to or occurring every day". It carries one recorded sense.
of or belonging to or occurring every day
“daily routine”
“a daily paper”
Definitions, synonyms and semantic relations for day-after-day come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.