Main Entry: watch·word

Pronunciation: \-ˌwərd\

Function: noun

Date: 15th century

1 : a word or phrase used as a sign of recognition among members of the same society, class, or group
2 a : a word or motto that embodies a principle or guide to action of an individual or group : slogan <“safety” is our watchword> b : a guiding principle <change is the watchword for both parties>