filtering Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. to remove impurities or unwanted substances from something Example Sentence Filtering is the process of removing impurities or unwanted elements from a substance or a system. Synonyms purify; strain; sift Antonyms add; mix Hear It! Say It! Write It! filtering Switch to cursive Start Share with your friends: