What do you consider cheating

I know I’m probably going to get a lot of comments saying well if you have to ask then yes it is cheating but I don’t know I’ve never done this. We are not official but like any means we’re barely even friends we’re just starting to get to know each other because we haven’t seen each other since like 2014. So what I wanna know is if I go on a date with another guy and have sex with another guy is that cheating on the guy that I’m talking to now