1. A disposition to behave in a certain way
   "the aptness of iron to rust"
   - propensity 
2. Appropriateness for the occasion
   "the phrase had considerable aptness"
   - appositeness

Derived forms: aptnesses

See also: apt

Type of: appropriateness, disposition

Antonym: inaptness

• plainly
• plainness
• Plains Indian
• plains lemon monarda
• plains pocket gopher
• plains pocket mouse
• plains spadefoot
• plains turkey
• plainsman
• plainsong
• plainspoken
• plaint
• plaintiff
• plaintiff in error
• plaintive
• plaintively
• plaintiveness
• plait
• plaiter
• plan
• plan of action
• plan of attack
• planar
• planaria
• planarian