Diurnality is a form of plant and animal behavior characterized by activity during daytime, with a period of sleeping or other inactivity at night. The common adjective used for daytime activity is "diurnal".

What is an example of diurnal?

The definition of diurnal is something that happens daily or in the daytime. An example of something diurnal is a diurnal flower that blooms in the sunlight, but closes at night.

What does diurnal mean in vocabulary?

The adjective diurnal can be used to describe anything that takes place in the daytime, but it is most often used in the field of biology to describe animals that are active during the day and then sleep at night.