pickday by day . day by day {adv.} Gradually. The patient got better day by day. Categories: add yours adverb Source: A Dictionary of American Idioms 'day by day' on video REGINA - Day by day [Official video HD] (ENG SUB) T-ARA - DAY BY DAY, 티아라 - 데이 바이 데이,Beautiful Concert 20120821 T-ara(티아라) _ DAY BY DAY T-ara - day by day ~ lyrics on screen (KOR/ROM/ENG) sort: relevance, mode: exact match, q: "day by day", maxResults: 4, videoEmbeddable: true, videoSyndicated: true, safeSearch: strict, type: video Subscribe to: American IdiomsEnglish Slang Add my comment