to withhold or deny consent to do, enter into or upon, etc.; refuse: He declined to say more about it.
Grammar. to inflect (a noun, pronoun, or adjective), as Latin puella, declined puella, puellae, puellae, puellam, puella in the five cases of the singular. to recite or display all or some subset of the inflected forms of a noun, pronoun, or adjective in a fixed order.