Definition of "abreast" in English

adverb

1. Side by side and facing forward.

2. (figurative) Alongside; parallel to.

3. Informed, well-informed, familiar, acquainted.

4. Followed by of or with: up to a certain level or line; equally advanced.

   • She believes it is important to keep abreast of new scientific developments.

5. (Scotland) Breast high (of an advancing wave).

   • The west wind blew a tempest, and, according to the common expression, brought in the water [of the Solway] three foot abreast.

6. (nautical) Side by side; also, opposite; on a line with the vessel's beam.

7. (obsolete) At the same time; simultaneously.

adjective

1. Side by side, facing forward.

2. (figurative) Alongside; parallel to.

3. Informed, well-informed, familiar, acquainted.

4. Up to a certain level or line; equally advanced

   • to keep abreast of [or with] the present state of science

5. (nautical) Side by side; also, opposite; over against; on a line with the vessel's beam.

preposition

1. Abreast of; alongside.

   • This ship sank abreast the island.