Abreast/əˈbrest/ Definition 1 of 2Pro Tip 1/3Physical Alignment Describes a literal side-by-side position with none ahead or behind. The runners stayed abreast until the final sprint. Pro Tip 2/3Group Movements Used when individuals or objects move together in a line without overlapping. The tour group walked two abreast down the narrow hallway. Pro Tip 3/3Spacing Awareness Implies that sufficient space is needed when moving abreast. They could not ride their bikes abreast on the crowded street.