The highest or uppermost side or portion of something
The word 'upside' is correct and can be used in written English. It generally refers to the opposite or reversal of something, and it can be used as both a noun and an adjective. For example, "The upside of the situation was that she didn't have to go to the doctor.".
In 1494 the political machinations of Ludovico Sforza played a part in causing a French invasion of Italy that turned priorities upside down.
Rather than opportunists and careerists, and hatred and aggression filling politics, the SNP showed they could do social justice, whether they're to the left, right or upside down.
On the upside, thank goodness it was noticed.
Travelling by canoe is a revelation, like looking at the world upside down; familiar places appear completely strange.
"I was set on moving on after Gary passed last year and had everything in motion when, overnight, my world was turned upside down again … it is a scenario that had made me physically ill".
But only Gilbert Jessop quite turned the tables upside down as rampaging Botham did.
"It was possible that the risks to CPI inflation in the medium term might have, if anything, shifted to the upside, but all members were also alert to the downside risk of current low inflation becoming entrenched".
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.
Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com