Attention refers to the behavioral and cognitive process of selectively concentrating on a discrete aspect of information, whether considered subjective or objective, while ignoring other perceivable information.
Common usages of attention include:
1. "Pay attention" - to focus one's mind on something
2. "Attention please" - a call for people to listen
3. In psychology - the cognitive process of selectively concentrating on one aspect of the environment
4. Military command - "Attention!" as a position of readiness
5. In machine learning - a mechanism that focuses on specific parts of input data