Dictionary.com

massless

[ mas-lis ]
/ ˈmæs lɪs /
Save This Word!
adjective Physics.
pertaining to an elementary particle having zero rest mass, as a photon.
QUIZ
ALL IN FAVO(U)R OF THIS BRITISH VS. AMERICAN ENGLISH QUIZ
There's an ocean of difference between the way people speak English in the US vs. the UK. Are your language skills up to the task of telling the difference? Let's find out!
Question 1 of 7
True or false? British English and American English are only different when it comes to slang words.
true
false
TAKE THE QUIZ TO FIND OUT

Origin of massless

First recorded in 1875–80; mass + -less

OTHER WORDS FROM massless

mass·less·ness, noun

Words nearby massless

Massinissa, massive, massive resistance, massive retaliation, mass leave, massless, mass man, mass-market, mass marketing, mass-market paperback, mass media
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use massless in a sentence

FEEDBACK