Meaning

verb trace the shape of

verb make a portrait of

originFrom Middle English limnen, limyne, lymm, lymn, lymne (“to illuminate (a manuscript)”), a variant of luminen (“to illuminate (a manuscript)”), short form of enluminen (“to shed light on, illuminate; to enlighten; to make bright or clear; to give colour to; to illuminate (a manuscript); to depict, describe; to adorn or embellish with figures of speech or poetry; to make famous, glorious, or…

Etymology from Wiktionary, CC BY-SA 3.0