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Elementary Dictionary
       

com·ma

comma

 
pronunciation:
ka m
part of speech: noun
definition: A comma is a little mark (,) that we use in writing. A comma separates words or parts of a sentence and makes the sentence easier to understand when people read it. We also use commas to separate things in a list and when we write large numbers like one thousand (1,000) and one million (1,000,000).
Our teacher says to put a comma between the day and the year when we write the date on the top of our paper.