glimpse (v.) Look up glimpse at Dictionary.com
c.1400, "to glisten, be dazzling," probably from Old English *glimsian "shine faintly," part of the group of Germanic words in *gl- having to do with "smooth; shining; joyous" (see gleam (n.)). If so, the intrusive -p- would be there to ease pronunciation. From mid-15c. as "to glance with the eyes;" from 1779 as "catch a quick view." Related: Glimpsed; glimpsing.
glimpse (n.) Look up glimpse at Dictionary.com
1530s, "faint or transient appearance," from glimpse (v.). From 1570s as "a brief and imperfect view." Earlier was the verbal noun glimpsing "imperfect vision" (late 14c.).