Dialogue (?; 115), n. [OE. dialogue, L. dialogus, fr. Gr. &unr_;, fr. &unr_; to converse, dia through + &unr_; to speak: cf. F. dialogue. See Legend.] 1. A conversation between two or more persons; particularly, a formal conservation in theatrical performances or in scholastic exercises.
[1913 Webster]

2. A written composition in which two or more persons are represented as conversing or reasoning on some topic; as, the Dialogues of Plato.
[1913 Webster]

Dialogue, v. t. To express as in dialogue. [R.]
[1913 Webster]

And dialogued for him what he would say. Shak.
[1913 Webster]