Boost \Boost\ (b[=oo]st), v. t. [imp. & p. p. {Boosted}; p. pr. & vb. n. {Boosting}.] [Cf. {Boast}, v. i.] To lift or push from behind (one who is endeavoring to climb); to push up; hence, to assist in overcoming obstacles, or in making advancement. [Colloq. U. S.] [1913 Webster]