mass in

British

verb

(adverb) to fill or block in (the areas of unified colour, shade, etc) in a painting or drawing

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The two asteroids orbit a shared center of mass in what scientists call a binary system.

From Science Daily • Mar. 9, 2026

There was a 10-centimeter mass in my right lung and fluid building up inside my lungs.

From The Wall Street Journal • Feb. 13, 2026

On Friday the legal center helped organize a memorial mass in honor of Yanez-Cruz at the Our Lady of Soledad Catholic Church, to honor Yanez-Cruz and others who died in custody, Gallegos said.

From Los Angeles Times • Jan. 18, 2026

So a healthy glacier gains as much mass in the upper areas as it loses in the lower areas.

From Slate • Dec. 19, 2025

There’s just enough moonlight to see a solid mass in front of me.

From "The Bletchley Riddle" by Ruta Sepetys and Steve Sheinkin

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023