Meaning

• Side by side, facing forward.

• Alongside; parallel to.

• Informed, well-informed, familiar, acquainted.

• Up to a certain level or line; equally advanced

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

• Side by side; also, opposite; over against; on a line with the vessel's beam.

Meaning

• Side by side and facing forward.

• Alongside; parallel to.

• Informed, well-informed, familiar, acquainted.

• 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."

• Side by side; also, opposite; on a line with the vessel's beam.

• At the same time; simultaneously.

Meaning

• Abreast of; alongside.

  "This ship sank abreast the island."