adjective

• Unified; sticking together; making up a whole.
• Orderly, logical and consistent.
• Aesthetically ordered.
• Having a natural or due agreement of parts; harmonious: a coherent design.
• (physics) Of waves having the same direction, wavelength and phase, as light in a laser.
• (botany) Attaching or pressing against an organ of the same nature.
• (mathematics, of a sheaf) Belonging to a specific class of sheaves having particularly manageable properties closely linked to the geometrical properties of the underlying space.