Well-ascertained, certain, sure. Of an argument: Well-founded, valid. Obsolete.

Definitely bound or limited, in time, space, extent, position, character, or nature; definite, fixed; clearly defined or individualized; distinct, as…

Definite, exact, precise. archaic.

Fixed, definite, determined. Obsolete.

Characterized by definiteness or exactness of expression; strictly or exactly defined; (of a person) definite and exact in statement.

Fixed, determined, definite. Obsolete.

Clearly distinguished; easily perceived.

Having fixed or exact limits; clearly defined, determinate, fixed, certain; exact, precise. (Of material, or, more commonly, immaterial things.)

Defined, definite, exact; distinctly marked or laid down; fixed.

Appointed or prescribed beforehand; †appointed for observance by the Church. Hence (with sense less… Of persons, things, places: Fixed, specified…

Fixed, determined, appointed. perfixed salt n. rare a salt that is not easily vaporized; cf. fixed, adj. 4b.

esp. That has obtained distinct development or formulation; decided, definite, settled.

Clearly defined or expressed; explicit, definite. Obsolete (archaic in later use).

Very clearly defined or noticeable; strongly emphasized; plainly evident.

Having the character of finality as a product; determinate, definite, fixed and final. Of an edition of a literary work, a textbook, etc…

Characterized by being determined or fixed.

With reference to something immaterial (as a concept, statement, phenomenon, etc.): sharply defined or delineated; easy to perceive or grasp; free…