Convention

1. v. i. An agreement or contract less formal than, or preliminary to, a treaty; an informal compact, as between commanders of armies in respect to suspension of hostilities, or between states; also, a formal agreement between governments or sovereign powers; as, a postal convention between two governments.
2. v. i. The act of coming together; the state of being together; union; coalition.
3. v. i. General agreement or concurrence; arbitrary custom; usage; conventionality.
4. v. i. A meeting or an assembly of persons, esp. of delegates or representatives, to accomplish some specific object, — civil, social, political, or ecclesiastical.
5. v. i. An extraordinary assembly of the parkiament or estates of the realm, held without the king’s writ, — as the assembly which restored Charles II. to the throne, and that which declared the throne to be abdicated by James II.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.