Put into service; make work or employ for a particular purpose or for its inherent or natural purpose. Synonyms: apply, employ, utilise, utilize. "We only use Spanish at home" , "I can't use this tool" , "Apply a magnetic field here" , "This thinking was applied to many projects" , "How do you utilize this tool?" , "I apply this rule to get good results" , "Use the plastic bags to store the food" , "He doesn't know how to use a computer"