/ Dictionary / Index L Lastex: Meaning and Definition of Find definitions for: Las•tex Pronunciation: (las'teks), [key] — Trademark. Trademark. a brand of yarn made from a core of latex rubber covered with fabric strands. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lastex (Thesaurus) last-ditch Last Gospel Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language