How do I Say and Write
"Treaty" in Portuguese?

Pronunciation : Trea"ty
Part of Speech : n.;
Etymology : [OE. tretee, F. trait?, LL. tractatus; cf. L. tractatus a handling, treatment, consultation, tractate. See Treat, and cf. Tractate.]
Definition : 1. The act of treating for the adjustment of differences, as for forming an agreement; negotiation. "By sly and wise treaty." Chaucer. He cast by treaty and by trains Her to persuade. Spenser.

2. An agreement so made; specifically, an agreement, league, or contract between two or more nations or sovereigns, formally signed by commissioners properly authorized, and solemnly ratified by the several sovereigns, or the supreme power of each state; an agreement between two or more independent states; as, a treaty of peace; a treaty of alliance.

3. A proposal tending to an agreement. [Obs.] Shak.

4. A treatise; a tract. [Obs.] Sir T. Browne.

pl. Treaties.
Source : Webster's Unabridged Dictionary, 1913