Dictionary & Thesaurus

1.

(adverb) in single file; "the prisoners came out one by one"

Synonyms: one after another, one at a time

2.

(adverb) one piece at a time; "she sold the plates by the piece"

3.

(adverb) apart from others; "taken individually, the rooms were, in fact, square"; "the fine points are treated singly"

Synonyms: individually, on an individual basis, separately, severally, singly