(~s)
1.
A ~ is a long strip of cloth with something written on it. Banners are usually attached to two poles and carried during a protest or rally.
...a large crowd of students carrying ~s denouncing the government...
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2.
If someone does something under the ~ of a particular cause, idea, or belief, they do it saying that they support that cause, idea, or belief.
Russia was the first country to forge a new economic system under the ~ of Marxism...
PHRASE: PHR n