mass
noun
a body of coherent matter, usually of indefinite shape and often of considerable size.
have been massing
-
present perfect progressiveof mass.present perfect progressive
Used to describe an action that began in the past, has continued continuously, and is still in progress.
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.
Thousands of Chinese fishing boats have been massing in geometric formations in the East China Sea, in coordinated actions that experts believe are part of Beijing's preparations for a potential regional crisis or conflict.
From Barron's ● Mar. 13, 2026
Migrants have been massing in Mexico near various parts of the border with the United States - many of them unsure about when, or how, to cross.
From Reuters ● May 11, 2023
The changes were welcomed by some, particularly leaders in cities where migrants have been massing.
From Seattle Times ● Jan. 8, 2023
President Biden and Russian President Vladimir Putin spoke Thursday in a 50-minute phone call about the rising tensions between the two countries over Ukraine, where Russian troops have been massing near the border.
From Washington Times ● Dec. 30, 2021
They have been massing their men for days.
From Harley Greenoak's Charge by Bertram Mitford
