The highest point of a wave is called the “crest.”
The crest is the point where the wave reaches its maximum height above the rest position of the medium through which it travels, such as water. When observing ocean waves, for instance, the crest is what you see at the peaks of the waves rolling in from the sea. Understanding the crest is important not only in oceanography but also in fields like physics and engineering, as it helps in studying wave energy, patterns, and behaviors.