Definitions:

1. Refers to the quality or state of being tall. NOUN
   • Despite his tallness, he managed to move gracefully and with agility.
2. Used to describe the vertical extent or height of a person, object, or structure relative to a standard or comparison group. NOUN
   • The tallness of the building was a significant factor in its architectural design.

Synonyms:

• elevation
• height
• loftiness
• stature