/ Dictionary / Index T tesseract: Meaning and Definition of Find definitions for: tes•ser•act Pronunciation: (tes'u-rakt"), [key] — n. the generalization of a cube to four dimensions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tesseract (Thesaurus) tessera Tessie Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language