Can I get some definitions of the terminology used in game to describe items attributes?

[sudden rune]

For instance, what is dash haste, dash speed, outbound healing, inbound healing, ability haste and ability damage?

Even down to the most basic terms, like attack damage and attack range, please? Right now, I'm going based on assumptions and I would like to have a lot of my assumptions confirmed. Plus, it would be most helpful to new players who actually read the descriptions to what the items do (or suppose to do). It would make better for reporting bugs just in case items don't do what they are suppose to do.

[patent niche]

Dash Haste - cooldown reduction of LSHIFT
Dash Speed - speed of how fast you get from point A of your dash to point B it makes your dash just faster
Outbound healing - healing you do on allies
Inbound healing - healing you receive
Ability haste - cooldown reduction

Ability damage - damage of your abilities but this one is a bit trickier since a lot of armory is just flat damage% and it’s unclear about ability damage scaling

If you play League ability damage is just AP

[wooden sonnet]

Dash speed actually increases the range of your dash too

It just makes your dash fast which results in more range