amain /əˈmeɪn/adverb 4verb 3forms 5 adverb4 •(dialect, UK) Out of control. •(literary, no longer used) With all of one's might; mightily; forcefully, violently.So likewise turnde the Prince vpon the Knight, And layd at him amaine with all his will and might. — 1596 •(no longer used) At full speed; also, in great haste.At length the Danes beeing assayled on eche side, both a front before, and on their backes behinde, oppressed as it were wyth multitude, they threwe downe theyr weapons and fled amain. — 1577 •(no longer used) Exceedingly; overmuch.Riches are mine, Fortune is in my hand; They whom I favour thrive in wealth amain, While Virtue, Valour, Wisdom sit in want. — 1671 verb3 •(no longer used) To lower (the sail of a ship, particularly the topsail). •(figurative, no longer used) To decrease or reduce (something). •(no longer used) To lower the topsail in token of surrender; to yield. formsamained · amaining · amains · more amain · most amain