Comprehensible by the mind; understandable.
Able to be treated as fact; real or concrete.
Touchable; able to be touched or felt; perceptible by the sense of touch.
Perceptible; able to be perceived.
A physical object; something that can be touched.
Real or concrete results.
Of a person: having extensive knowledge of a subject.
Of an argument, etc.: based on good judgment and solid reasoning.