ˈwātlə̇s adjective
1. : having no weight
2. : having little or no perceptible weight
floating freely in a weightless condition, at the same velocity as the spaceship — Current Biography
a baby bat … fluffy and weightless as a moth — Frederic Prokosch
jackets made of a weightless polyester fabric
• weight·less·ly adverb
• weight·less·ness noun -es