A single breast. Opposite of two breasts.
"Hey look! Abreast!"
by not_andrew May 06, 2009
1 more definition
Top Definition
1. side by side; beside each other in a line
2. equal to or alongside in progress, attainment, or awareness (usually fol. by of or with)
1.They walked two abreast down the street.

2.To keep abreast of scientific developments; keeping abreast with the times.
by Kimiat June 02, 2009

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