Definition of bi-level
adjective
[attributive] having or functioning on two levels; arranged on two planes:the unit’s bi-level design keeps water in the sink denoting a style of two-story house in which the lower story is partially sunk below ground level, and the main entrance is between the two stories; split-level. denoting a railroad passenger coach or a bus with seats on two levels.
noun
a bi-level house:a three-bedroom bi-level