''gainst :: 'Gainst (prep.) A contraction of Against.
Against :: Against (prep.) Abreast; opposite to; facing; towards; as, against the mouth of a river; -- in this sense often preceded by over..
Against :: Against (prep.) From an opposite direction so as to strike or come in contact with; in contact with; upon; as, hail beats against the roof..
Against :: Against (prep.) In opposition to, whether the opposition is of sentiment or of action; on the other side; counter to; in contrariety to; hence, adverse to; as, against reason; against law; to run a race against time..
Against :: Against (prep.) By of before the time that; in preparation for; so as to be ready for the time when.