What is perception?

Cambridge dictionary
perception
pəˈsɛpʃ(ə)n/
noun
noun: perception; plural noun: perceptions
  1. 1.
    the ability to see, hear, or become aware of something through the senses.
    “the normal limits to human perception”
    • awareness of something through the senses.
      “the perception of pain”
    • PSYCHOLOGYZOOLOGY
      the neurophysiological processes, including memory, by which an organism becomes aware of and interprets external stimuli.
  2. 2.
    the way in which something is regarded, understood, or interpreted.
    “Hollywood’s perception of the tastes of the American public”
Origin
late Middle English: from Latin perceptio(n- ), from the verbpercipere ‘seize, understand’ (see perceive).