From King Dictionary of Contemporary Englishcurtsycurt‧sy, curtsey /ˈkɜːtsi $ ˈkɜːr-/ verb (curtsied, curtsying, curtsies) [intransitive] SIGN/GESTUREif a woman curtsies, she bends her knees with one foot in front of the other as a sign of respect for an important personbowcurtsy noun [countable]→ See Verb table
Examples from the Corpus
curtsySarah curtsied as the future queen entered the room.He instructed the women to remember to curtsy before the royal personage.
Origin curtsy (1500-1600) courtesy