<p><strong>conjunction</strong></p><ul><li>for the reason that;</li><li>due to the fact that: The boy was absent because he was ill.</li></ul><p><strong>preposition</strong></p><ul><li>Informal. (used directly before a noun, adjective, verb, interjection, etc., to convey a very concise rationale, excuse, or explanation):<ul><li>We’re a little like monkeys because evolution.</li><li>He doesn’t practice enough: because lazy.</li><li>I love doughnuts because yum.</li></ul></li></ul>