two by two
Definition of two by two
: two at a time : first two and then another two, etc. They entered the room two by two.
Word by Word Definitions
: being one more than one in number
: two countable individuals not specified
: a small approximate number of indicated things
: the second in a set or series
: a 2-dollar bill
: something having two units or members
Seen and Heard
What made you want to look up two by two? Please tell us where you read or heard it (including the quote, if possible).