Available Definitions:
1) a. - Hastening or forward; hence, tending to further or promote a proposed object; fit or proper under the circumstances; conducive to self-interest; desirable; advisable; advantageous; -- sometimes contradistinguished from right.
2) a. - Quick; expeditious.
3) n. - That which serves to promote or advance; suitable means to accomplish an end.
4) n. - Means devised in an exigency; shift.