- lack of continuity; irregularity: The plot of the book was marred by discontinuity.
- a break or gap: The surface of the moon is characterized by major discontinuities.
- a point at which a function is not continuous.
- a zone deep within the earth where the velocity of earthquake waves changes radically.
- lack of rational connection or cohesion
- a break or interruption
- maths
- the property of being discontinuous
- the point or the value of the variable at which a curve or function becomes discontinuous
- geology
- a zone within the earth where a sudden change in physical properties, such as the velocity of earthquake waves, occurs. Such a zone marks the boundary between the different layers of the earth, as between the core and mantle
- a surface separating rocks that are not continuous with each other
