Fetching details from the dictionary...

development; growth; expansion; extension; flourishing
development (of a situation, story, etc.); advancement; progression; unfolding
playing around (sexually; esp. of a male homosexual); having an active sex life
近年、科学技術がとても発展している。
Science and technology are developing.
事件は意外な方向へ発展した。
The incident developed in an unexpected direction.
この町の発展に貢献したいと思います。
I want to contribute to the town's development.