dewclaw Syllabification: (dew·claw)Pronunciation: /ˈd(y)o͞oˌklô/Definition of dewclaw noun a rudimentary inner toe present in some dogs. a false hoof on an animal such as a deer, which is formed by its rudimentary side toes. Origin: late 16th century: apparently from the nouns dew and clawdewclaw in other Oxford dictionaries Definition of dewclaw in the British & World English dictionary