At an angle from the vertical or horizontal.
Diagonally over or across.
At an angle from the vertical or horizontal; at the point of falling over.
Tilting or as if tilting (charging with a lance, like a knight on horseback in a joust).
Having a slope.
Fought at a particular place and time, at which opposing forces anticipate and commit to fighting; (later especially) involving sustained, intense military (or by extension, political, legal etc.) fighting.
Covered in pitch.
Having a specified tonal range.