Broiling is cooking with high heat from either above or below, but not both.
From both above and below (or from both sides) makes it roasting or baking, if it's in an enclosed space. An open space would make it toasting.
To make A toast is entirely different to making toast, which you can do with broiling, but it takes longer that way due to having to turn.
Which is also broiling, if the heat is coming from one side.
But grilling is specifically from above.
Like our oven has a grill, which heats from above.
And it's why I'm quite choosy about accepting invitations...
I cook it properly, at an appropriate heat level, for a sensible time for the product.