notice

noun
  1. The act of observing or paying attention to something. noun
    She took notice of the changes in the weather.
    He didn't notice the error in the report.
  2. A written or printed statement that gives information or a warning. noun
    There was a notice on the door about the meeting.
    The notice informed residents of the upcoming water outage.
  3. Advance notification or warning. noun
    You need to give two weeks' notice before leaving the job.
    The event was canceled without notice.
  4. To become aware of something or someone through observation or information. verb
    Did you notice the new painting in the hallway?
    I noticed that she was wearing a new dress.
  5. To acknowledge or pay attention to someone or something. verb
    He didn't even notice her when she walked in.
    The teacher noticed the student's improvement.