“Knowledge is a familiarity, awareness, or understanding of someone or something, such as facts, information, descriptions, or skills, which is acquired through experience or education by perceiving, discovering, or learning,” according to Wikipedia’s definition. Knowledge can also refer to a theoretical or practical understanding of a subject.
Plato believed that knowledge came from believing something to be true, along with it actually being true, and with being justified in believing it to be true. In my opinion, this is a good way of understanding knowledge, because we are (psychologically) required to believe something to be true in order to count it in our head as knowledge; otherwise, it’s speculation or fake news.
Read also: The changing nature of knowledge