Monthly
Webster's Dictionary [1]
(1): ( adv.) As if under the influence of the moon; in the manner of a lunatic.
(2): ( adv.) Once a month; in every month; as, the moon changes monthly.
(3): ( a.) Done, happening, payable, published, etc., once a month, or every month; as, a monthly visit; monthly charges; a monthly installment; a monthly magazine.
(4): ( a.) Continued a month, or a performed in a month; as, the monthly revolution of the moon.
(5): ( n.) A publication which appears regularly once a month.
King James Dictionary [2]
Monthly, a. Continued a month or performed in a month as the monthly revolution of the moon.
1. Done or happening once a month, or every month as the monthly concert of prayer a monthly visit.
Monthly, adv. Once a month in every month. The moon changes monthly.
1. As if under the influence of the moon in the manner of a lunatic. Not used.