(1):
(v. t.) To make thinner or more liquid by admixture with something; to thin and dissolve by mixing.
(2):
(v. t.) To diminish the strength, flavor, color, etc., of, by mixing; to reduce, especially by the addition of water; to temper; to attenuate; to weaken.
(3):
(v. i.) To become attenuated, thin, or weak; as, it dilutes easily.
(4):
(a.) Diluted; thin; weak.