I am very tall. I stand at 6ft nine inches tall.
That's pretty tall. Did you play basketball? 
Yes I played college ball. For 4 years and tore my ACL my junior year.
Height is sometimes used as a name for more abstract definitions, like in algebra.
I din't know that. Very interesting. I was never good at Algebra.
In space models, height is the third dimension, the other two being length and width.
Wow. I wasn't aware there were dimensions and with regards to Space Models.
Yeah, those are more abstract definitions of height.