Comma Definition-a punctuation mark (,) indicating a pause between parts of a sentence. It is also used to separate items in a list and to mark the place of thousands in a large numeral.


  • use commas to separate words and word groups with a series of three or more.
  • Use a comma to separate two adjectives when the word and can be inserted between them.
  • Use a comma when an -ly adjective is used with other adjectives.
  • Use commas before or surrounding the name or title of a person directly addressed.
  • Use a comma to separate the day of the month from the year and after the year.
  • Use a comma to separate a statement from a question.
  • Use a comma when beginning sentences with introductory words such as well, now, or yes.
  • Use the comma to separate two sentences if needed.