பட்டறிவு அல்லது அனுபவம் (experience) என்பது புதியதாக தோன்றும் அக அறிவு. அனுபவம் என்ற சொல் பவ என்ற சம்க்கிருத மூலவேர் கொண்டது. பவ என்றால் நிகழ்வது, ஆவது என இருபொருள். நிகழ்வதை அறிவதும் ஆவதை உணர்வதுமே அனுபவம்.

Experience refers to conscious events in general, more specifically to perceptions, or to the practical knowledge and familiarity that is produced by these processes. Understood as a conscious event in the widest sense, experience involves a subject to which various items are presented. In this sense, seeing a yellow bird on a branch presents the subject with the objects "bird" and "branch", the relation between them and the property "yellow". Unreal items may be included as well, which happens when experiencing hallucinations or dreams. When understood in a more restricted sense, only sensory consciousness counts as experience. In this sense, experience is usually identified with perception and contrasted with other types of conscious events, like thinking or imagining. In a slightly different sense, experience refers not to the conscious events themselves but to the practical knowledge and familiarity they produce. Hence, it is important that direct perceptual contact with the external world is the source of knowledge. So an experienced hiker is someone who has actually lived through many hikes, not someone who merely read many books about hiking. This is associated both with recurrent past acquaintance and the abilities learned through them.