Does the term "short" imply that you are leveraging/margin trading? Or can short mean simply selling, waiting then re-buying cheaper?
I think it depends on the market!
Up for me, I think that leveraging/margin trading is an extra layer of complexity and not the necessary part of the trading process.
If market allows selling now and buying later without lending money - you can still say you've shorted.
Like in crypto, I might sell my bitcoins today (let's say for 1200$/btc) - I've shorted my bitcoins. Now I will wait, wait, wait, and who knows, maybe someday the price of bitcoin will be 500$. I will buy the same amount of bitcoins that I've sold today and the remaining $$$ will be my profit.
Who will tell me that isn't correct, and for me to really short in classical terms, I should lend 10x bitcoins to what I currently have and sell all of them?