Definition of upside down
1 : in such a way that the upper and the lower parts are reversed in position
2 : in or into great disorder <turned their world upside down>
Examples of upside down in a sentence
You hung the picture upside down!
To remove the plant, turn the pot upside down and tap gently on the bottom to loosen it.
The baby was holding the book upside down.
Origin and Etymology of upside down
alteration of Middle English up so doun, from up + so + doun down
First Known Use: 15th century
UPSIDE DOWN Defined for English Language Learners
Definition of upside down for English Language Learners
: with the top at the bottom and the bottom at the top : placed so that the end that should be at the top is at the bottom
UPSIDE DOWN Defined for Kids
Definition of upside down for Students
1 : in such a way that the upper part is underneath and the lower part is on top <I turned his chocolate pudding upside down on his tray. — Jerry Spinelli, Crash>
2 : in or into great confusion <The injury turned her life upside down.>
Legal Definition of upside down
: underwater <upside down mortgages> <upside down homes> <upside down homeowners>
Seen and Heard
What made you want to look up upside down? Please tell us where you read or heard it (including the quote, if possible).