upside down
[adjective]
Synonyms:
- inverted, overturned, upturned
- confused, chaotic, disordered, higgledy-piggledy (informal), muddled, topsy-turvy

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Contrasted words: orderly, well-ordered, logical, reasonable, sensible, sound, legitimate, plausible
Related Words: reversed, inverted, chaotic, confused, helter-skelter, jumbled, mixed-up, fouled-up, haywire, snafu

[TahlilGaran] English Synonym Dictionary ▲

I. ˌupside ˈdown¹ adverb
[Date: 1400-1500; Origin: up so down 'up as if down' (14-16 centuries)]

1. with the top at the bottom and the bottom at the top:
To get the plant out of the pot, turn it upside down and give it a gentle knock.

2. turn something upside down
a) to make a place very untidy when you are looking for something:
The burglars have turned our house upside down.
b) to cause a lot of change and confusion in a situation or in someone’s life:
the story of a young girl whose life was turned upside down

[TahlilGaran] Dictionary of Contemporary English ▲

II. ˌupside ˈdown² adjective
in a position with the top at the bottom and the bottom at the top:
an upside down U shape

[TahlilGaran] Dictionary of Contemporary English ▲

upside down
adv. phr. Overturned so that the bottom is up and the top is down.
The ladybug lay upside down in the sand and was unable to take off.
The problem with this company is that everything is upside down; we need a new C.E.O.

[TahlilGaran] English Idioms Dictionary ▲