grammes Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. the basic unit of weight in the metric system equal to one thousandth of a kilogram or 0.0353 ounce; abbreviated g Chiefly British. Example Sentence The penny weighed only a few grammes. Synonyms basic unit of weight; 0.0353 ounce; g Antonyms pound Hear It! Say It! Write It! grammes Switch to cursive Start Share with your friends: