side by side; beside each other in a line: They walked two abreast down the street.
2.
equal to or alongside in progress, attainment, or awareness (usually followed by of or with ): to keep abreast of scientific developments; keeping abreast with the times.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a fool or simpleton; ninny.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a stew of meat, vegetables, potatoes, etc.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.