A favourable time or circumstance for doing something; a chance or opportunity.
留学は英語を伸ばすいい機会だ。
Studying abroad is a great opportunity to improve your English.
仕事で海外出張する機会が増えた。
I've had more opportunities to go on business trips abroad.
説明会は会社の雰囲気を知る良い機会になる。
An information session is a good chance to learn about the company's atmosphere.
機会があれば、ぜひ手伝ってください。
If you get the chance, please help out.