Deviant behavior, a behavior that is a recognized violation of social norms.

Standard deviation, which is based on the square of the difference.

Absolute deviation, where the absolute value of the difference is used.

Magnetic deviation, the error induced in compasses by local magnetic fields.

Frequency deviation, the maximum allowed "distance" in FM radio from the nominal frequency a station broadcasts at.

Deviation (statistics), the difference between the value of an observation and the mean of the population in mathematics and statistics.

Deviationism, an expressed belief which is not in accordance with official party doctrine.

Deviation Records, a record label.