equal sign

WordReference Random House Learner's Dictionary of American English © 2025

ˈe•qual ˌsign or ˈe•quals ˌsign,n. [countable]

1. Mathematics the symbol (=) used, esp. in a mathematical or logical expression, to indicate that the terms it separates are equal.

WordReference Random House Unabridged Dictionary of American English © 2025

e′qual sign′, [Math.]

1. Mathematics the symbol (=), used in a mathematical expression to indicate that the terms it separates are equal.

Also, e′quals sign′. 

• 1905–10

Collins Concise English Dictionary © HarperCollins Publishers::

equal sign, equals sign noun

1. the symbol =, used to indicate a mathematical equality