Synonyms of adv one_by_one

3 senses of one by one

Sense 1
one by one, one after another, one at a time -- (in single file; "the prisoners came out one by one")

Sense 2
by the piece, one by one -- (one piece at a time; "she sold the plates by the piece")

Sense 3
individually, separately, singly, severally, one by one, on an individual basis -- (apart from others; "taken individually, the rooms were, in fact, square"; "the fine points are treated singly")