Search Result for "one at a time":
Wordnet 3.0

ADVERB (1)

1. in single file;
- Example: "the prisoners came out one by one"
[syn: one by one, one after another, one at a time]



WordNet (r) 3.0 (2006):

one at a time
    adv 1: in single file; "the prisoners came out one by one" [syn:
           one by one, one after another, one at a time]