the mind > language > linguistics > study of grammar > a part of speech > conjunction > [adjective] > giving a reason (4)
Grammar. Of a conjunction: that expresses a reason for a statement. Now rare.
Grammar. Of a conjunction: that introduces the reason for the preceding statement.
Of, characterized by, or expressive of, ratiocination; given to ratiocination.
That involves ratiocination; (also) †expressing a reason (obsolete).