The Hebrew chizzayon (H2384) refers to a prophetic vision — a direct divine communication through visual revelation given to a prophet, typically during sleep or a trance-like state.
Chizzayon is a form of divine speech, standing alongside dreams and auditory prophecy as a primary mode of God's self-revelation. Joel 2:28 (quoted by Peter at Pentecost) promises that in the last days God will pour out His Spirit and 'your young men will see visions (chizzayon).' This democratization of prophetic vision marks the New Covenant — direct access to divine revelation through the Holy Spirit.