Brink vs. Cusp — What's the Difference?

The upper edge of a steep or vertical slope

A point or pointed end.

The margin of land bordering a body of water.

A pointed or rounded projection on the chewing surface of a tooth.

The point at which something is likely to begin; the verge

A triangular fold or flap of a heart valve.

The edge, margin, or border of a steep place, as of a precipice; a bank or edge.

(Mathematics) A point at which a curve crosses itself and at which the two tangents to the curve coincide.

(figurative) The edge or border.

(Architecture) The point of intersection of two ornamental arcs or curves, such as the inner points of a trefoil.

The edge, margin, or border of a steep place, as of a precipice; a bank or edge, as of a river or pit; a verge; a border; as, the brink of a chasm. Also Fig.

(Astronomy) Either point of a crescent moon.

A region marking a boundary

The boundary between two astrological signs or Zodiacal constellations.

The edge of a steep place

A sharp point or pointed end.

The limit beyond which something happens or changes;

(figuratively) An important moment when a decision is made that will determine future events.

(geometry) A point of a curve where the curve is continuous but has no derivative, but such that it has a derivative at every nearby point.

(architecture) A point made by the intersection of two curved lines or curved structures, a common motif in Gothic architecture.

(astrology) A boundary between zodiacal signs and houses.

(dentistry) Any of the pointed parts of a canine tooth or molar.

(anatomy) A flap of a valve of a heart or blood vessel.

A point of transition.

A triangular protection from the intrados of an arch, or from an inner curve of tracery.

The beginning or first entrance of any house in the calculations of nativities, etc.

The point or horn of the crescent moon or other crescent-shaped luminary.

A multiple point of a curve at which two or more branches of the curve have a common tangent.

A prominence or point, especially on the crown of a tooth.

A sharp and rigid point.

To furnish with a cusp or cusps.

Point formed by two intersecting arcs (as from the intrados of a Gothic arch)

A thin triangular flap of a heart valve

Small elevation on the grinding surface of a tooth