Opening (noun)

1. A hole or gap that allows access or passage.
2. A beginning or start, especially of a new era, activity, or venture.
3. A job or position that is available to be filled.
4. An opportunity or chance.

Origin:

Late middle english: from the verb open + -ing1.

Examples:

1. She found an opening in the fence and slipped through.
2. The opening ceremony of the Olympics was spectacular.
3. There are several job openings in the company for software engineers.
4. The opening in the market offered a chance for investors to make profits.
5. The opening of the new museum attracted thousands of visitors.