1) Buoyant 2) Debut novel 3) Describing man in outer space 4) Feathery 5) Flimsy 6) Floating 7) Fluffy 8) Frothy 9) Insubstantial 10) Light 11) Lighter than air 12) Number-one single in Scotland 1) Lighter than air 
[wireless communications] Weightless is a proposed proprietary open wireless technology standard for exchanging data between a base station and thousands of machines around it using White space (frequency channels intended for TV broadcasting but currently unoccupied) with high levels of security. Weightless is managed by the Weightless SIG...
• (a.) Having no weight; imponderable; hence, light.
Weight'less adjective Having no weight; imponderable; hence, light. Shak. 
[adj] - having little or no weight or apparent gravitational pull
adjective having little or no weight or apparent gravitational pull; light; `floating freely in a weightless condition`; `a baby bat...fluffy and weightless as a moth`; `jackets made of a weightless polyester fabric`