He is playing outside.

In addition to keys and wallets, there are many small items in my bag to take outside.

He is playing outside.

He is playing outside the house.

He is deeply interested in Buddhist teachings, but he is open to learning non-Buddhist teachings as well.

She seemed nervous, biting her lower lip.

She seemed nervous, biting her lower lip.

He bit his both lips trying to hide his nervousness.

In Sanskrit phonology, the sounds within the lips are very important.

In female anatomy, the labia minora is a very important part.