Attention (noun)

1. The act or state of paying attention; the ability to give attention.
2. A state of being alert and focused on something.
3. A state of being aware of and responsive to one's surroundings.

Origin:

Middle english, from old french atencion, from atendre to attend.

Examples:

1. She managed to get the teacher's attention.
2. He paid close attention to the speaker's every word.
3. He was so lost in his thoughts that he didn't even realize the teacher was calling his name.
4. The dog's attention was focused on the treat.
5. He was in a state of deep attention as he listened to the music.