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Adjective: abreast  u'brest
  1. Being up to particular standard or level especially in being up to date in knowledge
    "kept abreast of the latest developments";
    - au courant, au fait, up on, apace [N. Amer]
Adverb: abreast  u'brest
  1. Alongside each other, facing in the same direction
    "The runners moved abreast as they approached the finish line";
    - apace [N. Amer]

See also: informed