Definitions

1. noun

a pair of the same; a number or amount twice as great as another; a second time or in the same way

“She won a double at the tennis tournament.”

2. verb

to make something twice as large or twice as great; to cause something to happen twice

“He doubled the recipe to make more cookies.”

3. adverb

twice; once again

“I double-checked the math to make sure it was correct.”

4. adjective

twice as much or as great; having two of the same

“Double the dose of medicine if you’re feeling worse.”