We found 2 dictionaries that define the word a proposition:

General (1 matching dictionary)

1. A-proposition: Webster's New World College Dictionary, 4th Ed.

Science (1 matching dictionary)

2. FOLDOP - Free On Line Dictionary Of Philosophy (No longer online)

Phrases: a testable proposition, more... ▸ Words similar to a proposition ▸ Usage examples for a proposition ▸ Idioms related to a proposition ▸ Wikipedia articles (New!) ▸ Words that often appear near a proposition ▸ Rhymes of a proposition ▸ Invented words related to a proposition