periods Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. the point . used to mark the end as of a declarative sentence or an abbreviation; an amount of time Example Sentence Pangaea broke apart during the Triassic and Jurassic Periods... Synonyms point; ending punctuation mark; time; spell Antonyms comma Hear It! Say It! Write It! periods Switch to cursive Start Share with your friends: