sec. Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition abbreviation for second or secondary or secretary or section or sector Example Sentence Spell the abbreviation for second or secondary or secretary. sec. Synonyms abbreviation for second; abbreviation for secondary; second Antonyms abbreviation for first Hear It! Say It! Write It! sec. Switch to cursive Start Share with your friends: