infections Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. the fact or state of being infected esp. by the presence in the body of bacteria or protozoans or viruses or other parasites Example Sentence He had two infections this year. Synonyms disease; sickness; virus Antonyms well; healthy Hear It! Say It! Write It! infections Switch to cursive Start Share with your friends: