/ Dictionary / Index P primary letter: Meaning and Definition of Find definitions for: pri'mary let'ter Pronunciation: [key] — Print. Print. a lowercase character having neither a descender nor an ascender, as a, c, e, i, m, n, o, r, s, u, v, w, x, z. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. primary intention primary memory Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language