1. Being of the nature of a notion or concept
   - conceptional, notional

See also: abstract, ideation

• adapt
• adaptability
• adaptable
• adaptation
• adaptational
• adaptative
• adapted
• adapter
• adaption
• adaptive
• adaptive radiation
• adaptor
• Adar
• Adar Sheni
• adaxial
• adaxially
• add
• add on
• add to
• add together
• add up
• add-in
• addable
• addax
• Addax nasomaculatus