Definitions for "Abreast"
Keywords:  alongside, fore, aft, beam, vessel
Side by side, with breasts in a line; as, "Two men could hardly walk abreast."
Side by side; also, opposite; over against; on a line with the vessel's beam; -- with of.
Two vessels are abreast of one anoth4er when they lie with their sides parallel. A vessel is abreast of any place or object when it is directly opposite to it.
Keywords:  simultaneously, time
At the same time; simultaneously.
Keywords:  science, advanced, equally, level, line
Up to a certain level or line; equally advanced; as, to keep abreast of [or with] the present state of science.
Keywords:  angles, opposite, right
Opposite or right angles to