Busy means actively employed, temporarily or habitually: A busy official. Diligent suggests earnest and constant effort or application, and usually connotes fondness for, or enjoyment of, what one is doing:

What is it? They are busy preparing for a hectic day's activity on saturday. Engaged in activity, as work; Actively and attentively engaged in work or a pastime. See examples of busy used in a sentence. If you are busy, you are working hard, or giving your attention to a particular thing: Learn more.

See examples of busy used in a sentence. If you are busy, you are working hard, or giving your attention to a particular thing: Learn more.