FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

mello μέλλω — mel'-lo — a strengthened form of 3199 (through the idea of expectation); to intend, i.e. be about to be, do, or suffer something (of persons or things, especially events; in the sense of purpose, duty, necessity, probability, possibility, or hesitation):--about, after that, be (almost), (that which is, things, + which was for) to come, intend, was to (be), mean, mind, be at the point, (be) ready, + return, shall (begin), (which, that) should (after, afterwards, hereafter) tarry, which was for, will, would, be yet.

see GREEK for 3199