One by One (film)
WordNet
adverb
(1) One piece at a time
"She sold the plates by the piece"
(2) Apart from others
"Taken individually, the rooms were, in fact, square"
"The fine points are treated singly"
(3) In single file
"The prisoners came out one by one"
WiktionaryText
Adverb
one by one
- Individually in succession; one at a time.
- The passengers escaped through the hatch one by one.