breast up verb6 •To move in close, to situate oneself right up against something; to belly up.Peeping down, we beheld a company, breasted up against a board, groaning under numerous viands. — 1849 •To confront an obstacle directly, by pushing straight into it.Unable to evade this, he drove into it, and his gallant mount breasted up and held its feet all the way across. — 1922 •To confront (someone or something) boldly, or to stand proudly or defiantly.In the south the northernmost Alps breasted up to be swept by the receding red-gold flood of the day's last light. — 1911 •To sail two boats side by side so that neither is in front of the other.Joel and Maryann, their skill honed by anger and determination to prove their point, breasted up the boats in quick time and edged side by side into Hatton's bottom lock. — 2004 •To cut the face of (a hedge) on one side so as to lay bare the principal upright stems of the plants.Cut off 15 inches, breast up the hedge and leave it standing at 30 inches . — 1852 •(old-fashioned) To reinforce or stabilize; to shore up.After the room is boarded up and the timbers drilled and charged, the drift is breasted up (see plan and elevation Fig. 22). — 1912 formsbreasted up · breasting up · breasts up