Wiktionary(0.00 / 0 votes)Rate this definition: 1  zephyr(Noun) a light wind from the west. 2  zephyr(Noun) any light refreshing wind; a gentle breeze. 3  zephyr(Noun) any thing of fine, soft, or light quality, especially fabric.  Zephyr(ProperNoun) The god of the West 1  Wind. Zephyr(ProperNoun) The west wind personified.