What does agleam mean? October 17, 2017 All Dictionary agleam meaning in General Dictionary Gleaming as faces agleam View more brilliant with a reliable but subdued shining Gleaming; since, deals with agleam. agleam meaning in Etymology Dictionary 1854, from a- (1) + gleam. agleam meaning in General Dictionary (adv. & a.) Gleaming; since, faces agleam.