D defs.my
Entry 1 sense Webster, 1913

Upside-down

/ŭp'-sīd-dounˌ/ · Up·side-down · IPA /ˈʌpsaɪddˌaʊn/
01 a. having the part normally pointed upward pointed downward; inverted.
  1. 1.
    having the part normally pointed upward pointed downward; inverted.