alongside each other and facing in the same direction - followed by of or with:
up to date (with); fully conversant (with)
WordReference Random House Learner's Dictionary of American English © 2025
a•breast /əˈbrɛst/USA pronunciation
adv., adj.
WordReference Random House Unabridged Dictionary of American English © 2025- side by side;
beside each other in a line: They walked two abreast.
- be or keep abreast of, be informed about;
be aware of;
be up-to-date:kept abreast of the new developments.
a•breast
(ə brest′),USA pronunciation adv., adj.
- side by side;
beside each other in a line:They walked two abreast down the street. - equal to or alongside in progress, attainment, or awareness (usually fol. by of or with):to keep abreast of scientific developments; keeping abreast with the times.
- a-1 + breast 1590–1600
Collins Concise English Dictionary © HarperCollins Publishers::
'abreast of' also found in these entries (note: many are not synonyms or translations):