From Longman Dictionary of Contemporary Englishday by dayday by daySLOWslowly and gradually Her health was improving day by day. → day
Examples from the Corpus
day by day• Day by day Jeffrey began to feel better.• But expectations seemed to diminish day by day over the last week.• Candidates became steadily more visible day by day throughout the campaign, however.• He can sense the options as they come and go, day by day.• Marion and I are living day by day.• She gets weaker day by day.• That generates an attitude of formal control, instead of the day by day probing and checking that should be practised.• This bid changes day by day.• Y., the investigation is moving forward the same way: day by day. 