(1):

(v. i.) To differ in opinion; to be of unlike or contrary sentiment; to disagree; - followed by from.

(2):

(n.) Contrariety of nature; diversity in quality.

(3):

(v. i.) To differ from an established church in regard to doctrines, rites, or government.

(4):

(v. i.) To differ; to be of a contrary nature.

(5):

(n.) The act of dissenting; difference of opinion; refusal to adopt something proposed; nonagreement, nonconcurrence, or disagreement.

(6):

(n.) Separation from an established church, especially that of England; nonconformity.