Definition:
A "crestless wave" refers to a wave in the ocean or sea that does not have a peak or a top (which is called a "crest"). Instead, it is more smooth and rolling. You can imagine it as a gentle rise and fall of the water without the pointy tips that usually make a wave look taller.
In more technical or poetic contexts, you might describe how "crestless waves" can indicate calm weather or a peaceful environment. For example:
While "crestless wave" specifically refers to a type of ocean wave, the words "crest" and "wave" can have different meanings in other contexts:
A "crestless wave" is a type of smooth, gentle movement in the sea without a peak. You can use this term when describing calm ocean conditions.