(1):

(v. t.) To soil with mud; to dirty; to render turbid.

(2):

(superl.) Abounding in mud; besmeared or dashed with mud; as, a muddy road or path; muddy boots.

(3):

(superl.) Turbid with mud; as, muddy water.

(4):

(superl.) Consisting of mud or earth; gross; impure.

(5):

(superl.) Confused, as if turbid with mud; cloudy in mind; dull; stupid; also, immethodical; incoherent; vague.

(6):

(superl.) Not clear or bright.

(7):

(v. t.) Fig.: To cloud; to make dull or heavy.