Japan is a leader in the world's high-tech industry.

I met my best friend in high school.

The flood reached its high water mark, causing extensive damage to the surrounding area.

Shortwave radio has a very high frequency.

I attended a senior high school in Japan.

The radio waves emitted by the device have an extremely high frequency.

I attended junior high school before going to senior high school.

I needed to kick it into high gear if I wanted to finish the project on time.

Super-high frequency waves are used in satellite communication.

The Royal Highness attended the ceremony.