Grade 0 customer Get Printable Handwriting (cus-tom-er) 3 syllables Rhymes Learn It! Spelling Test Definition noun. a person who buys a product or uses a service from a business Example Sentence The customer had to wait in a long checkout line. Synonyms buyer; client; guest; consumer Antonyms seller; merchant Rhymes Three Syllable Rhymes (1) customer Share with your friends: