If it can be used to escape, obviously it is an escape. Of course there are other functionalities to his ult. My point was also taht because it does something, it can't be something else. His ult is an escape.
Then I disagree. If it can be used as an escape then it is an escape.
This is getting pretty silly. It jumps to the land of "If it can be used as a weapon then it is a weapon." You see a boy holding two sticks. Well, the sticks can be used as weapons. Maybe not very good weapons, maybe only useful in the situation that he stabs them into your eyes, but since they CAN be used as weapons, you analyze the situation as "The boy is holding two weapons"?
Without people agreeing on a definition, any sort of argument about it seems basically pointless. I consider escape moves to be things that affect your movement/position/speed, and which do not require you to jump to something that can hurt you. I can think of the following that do not require jumping to a jungle or enemy monster/minion/champion:
Kat jump to ward
Jax jump to ward (I think this works?)
Lee Sin jump to ward
Riven dash (does not go through walls but requires no target)
Graves dash
Gragas dash
Caitlyn knockback
Tristana rocket jump
Corki flight thingy
Ezreal warp (don't think this requires a target)
Kassadin warp (don't think this requires a target)
Leblanc warp (don't think this requires a target)
Renekton dash (don't think this requires target for first dash)
Jarvan flag + pull
Fizz jump
Nidalee jump (I -think- this can go through walls)
Nautilus pull (requires terrain so it's questionable)
Shaco blink, also goes invisible
Shen dash (I think this can go through walls and doesn't require a target)
Ziggs satchel hop
Tryndamere spin
Vayne tumble (I'm almost certain this can't go through walls, but it gains distance and can briefly cloak)
Ults (not counting Kassadin since I think that's super low-cooldown):
TF ult (does this require you to ult near an enemy champion?)
Pantheon ult
Ahri ult dash
Malphite ult dash (don't think this requires a target)
Shyvana ult dash (don't think this requires a target)
Hecarim (ult and/or speedboost, I don't know him well enough to remember how it works)
If you consider speedboosts:
Teemo speedboost
Rumble speedboost
Zilean speedboost
Eve speedboost
Blitz speedboost
Draven speedboost
Gangplank speedboost
Jayce speedboost
Kennen speedboost
Lulu speedboost (I thinks she has a slight one?)
Nunu speedboost
Master yi speedboost
Orianna speedboost
Poppy speedboost
Rammus speedboost
Singed speedboost
Sivir speedboost
Skarner speedboost
Sona speedboost
Udyr speedboost
I have left out slows since those don't affect the champion using them specifically, but there are of course those as well. So, I'd say even with the definition I mentioned, there are a fair number of moves that can be used as escapes.