- Having four ways meeting in a point; leading in four directions.
- Belonging to the quadrivium: thus, <em>quadrivial astrology</em> is astrology in the sense in which astrology is a branch of the quadrivium — that is, astronomy.
- One of the four arts constituting the quadrivium.
- One of the four “liberal arts” making up the quadrivium.
- Having four ways meeting in a point.
- Any of the four "liberal arts" making up the <xref>quadrivium</xref>.