ˈled.ə(r)d, -etə- adjective
Etymology: Middle English, from letter + -ed
1.
a. : possessed of learning : educated
spread their translations before the lettered public — G.C.Sellery
b. : of, relating to, or characterized by learning : cultured
a man of lettered tastes — Benjamin Disraeli
2. : inscribed with or as if with letters
the walls of the lower grade schoolroom were covered with … lettered statements — Oliver LaFarge
lettered tortoise
3. : consisting of letters
lettered cipher