Abreast

Adverb

1. Side by side and facing forward. [First attested from around (1350 to 1470.)]^[2]
2. (figuratively) Alongside; parallel to. [First attested in the mid 17^th century.]^[2]
3. Informed, well-informed, familiar, acquainted. [First attested in the mid 17^th century.]^[2]
4. Followed by of or with: up to a certain level or line; equally advanced. [First attested in the mid 17^th century.]^[2]
5. (Scotland) Breast high (of an advancing wave).
6. (nautical) Side by side; also, opposite; on a line with the vessel's beam. [First attested in the late 17^th century.]^[2]
7. (obsolete) At the same time; simultaneously.

Synonyms

• (informed): apprised, informed, up to date, up-to-date

Adjective

1. Side by side, facing forward. [First attested from around (1350 to 1470.)]^[2]
2. (figuratively) Alongside; parallel to. [First attested in the mid 17^th century.]^[2]
3. Informed, well-informed, familiar, acquainted. [First attested in the mid 17^th century.]^[2]
4. Up to a certain level or line; equally advanced[First attested in the mid 17^th century.]^[2]
5. (nautical) Side by side; also, opposite; over against; on a line with the vessel's beam. [First attested in the late 17^th century.]^[2]

Preposition

1. Abreast of; alongside.^[3]