To cancel someone (usually a celebrity or other well-known figure) means to stop giving support to that person. The act of canceling could entail boycotting an actor's movies or no longer reading or promoting a writer's works.

In pop culture, canceled means to make someone or something irrelevant due to current drama.

To dismiss something/somebody. To reject an individual or an idea

Someone who makes a plan, includes everyone and their mama and then cancels it at the very last minute.

cancelled or "cancelled culture" basically means if you or anyone does something thats considered "bad" (being racist,sexist,manipulative etc..) you would most likely be "cancelled" , basically means no one would look at you in a good way anymore, no respect, etc. this is mostly found on the internet and people who are mainly "cancelled" are celebrites and online influencers

You are over with. Done for. No redemption. Be gone.

in fighting games, a cancel is where you interrupt an attack by inputting another attack or command. it is used for making combos