/ Dictionary / Index Z Zephiran: Meaning and Definition of Find definitions for: Zeph•i•ran Pronunciation: (zef'u-ran"), [key] — Trademark. Trademark. a brand of benzalkonium chloride. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Zephaniah zephyr Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language