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com·ma

comma

 
pronunciation:
ka m
part of speech: noun
definition: a punctuation mark (,). It is used to separate words, phrases, or other parts of a sentence or list, or to show a pause in speech. It is also used when writing numbers of one thousand or greater to mark off groups of three digits.
Put a comma between the day and the year when you write the date, like this: January 17, 2017.He won $1,000,000 in the lottery.