A steep hill is one that's very high and has a strong slope.
When people talk about steep in everyday situations, they often mean it literally – like a steep hill or mountain. For example, if you're planning a hike and someone warns you that the trail gets really steep halfway up, it means the path becomes quite difficult to walk on because of its steep incline.
Of a near-vertical gradient; of a slope, surface, curve, etc. that proceeds upward at an angle near vertical.
Example: a steep hill or mountain; a steep roof; a steep ascent; a steep barometric gradient
