1. (

• indefinable ,
• undefinable

) not capable of being precisely or readily described; not easily put into words; "an indefinable feeling of terror"; "an abstract concept that seems indefinable" ;

2. (

• indefinable ,
• indescribable ,
• ineffable ,
• unspeakable ,
• untellable ,
• unutterable

) defying expression or description; "indefinable yearnings"; "indescribable beauty"; "ineffable ecstasy"; "inexpressible anguish"; "unspeakable happiness"; "unutterable contempt"; "a thing of untellable splendor" ;