› a larger than usual number of events of a similar, often bad, type, happening within the same period: a wave of sth During the recession there was a wave of bankruptcies and mass unemployment. a crime wave
› the pattern in which some types of energy, such as sound, light, and heat, are spread or carried: light/sound/radio waves Large amounts of data is transmitted via light waves inside fiberoptic cables.
make waves › to do things that make people notice you, often in a way that causes trouble: Sometimes, an employee feels intimidated by workplace bullying, but, they don't want to make waves.