I. ˈtərn-ˈdau̇n adjective
Date: 1763
: capable of being turned down ; especially : worn turned down
a turndown collar
II. ˈtərn-ˌdau̇n noun
Date: 1849
1. : something turned down ; also : an instance of turning something (as a bed sheet) down
hotel turndown service
2. : rejection
3. : downturn