/ Dictionary / Index F first consonant shift: Meaning and Definition of Find definitions for: first' con'sonant shift" Pronunciation: [key] the consonant shift described by Grimm's law, which distinguishes Germanic languages from other Indo-European languages. Cf. consonant shift, second consonant shift. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. First Commandment first cousin Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language