From the Academic Word List

If I am giving someone directions on how to get to a certain place, and that person nods their head, that person gives me an indication they understand.

Definition

Indication means to give a sign or a signal, or to show something is true.

Word Family

indicate (verb), indication (noun)

Examples:

• He indicated with his eyes that he understood the message.
• There was no indication that the company was going to close.  On the contrary, there was every indication they would continue their business.
• Sneezing, a runny nose, and a sore throat are all indications someone has a cold.