The strict policy of enforcing all the laws of a state, or the rules of an institution, and allowing no toleration or compromise even for first-time offenders or petty violations.

simple past tense and past participle of zero-rate

(chiefly Britain) subject to no value-added tax when sold (but the supplier can still recover VAT attributable to it)

(of a temperature) below 0°C; freezing cold

A tensor with all entries equal to zero; where any pattern of covariant and contravariant indices have all components equal to 0. / A generalization of the zero vector to tensor space.

(physics) The coldest possible temperature, zero on the Kelvin scale, or approximately −273.15 °C, −459.67 °F; total absence of heat; temperature at which motion of all molecules would cease.

The state of apparent weightlessness which occurs in a very low gravity field, or in free fall.

(firearms) The adjustment of a sight, exactly parallel to the axis of the bore of the gun to which it is attached.

(logic) Describing situations in which the veracity of a statement may be shown to be true without revealing any other information.

(US) The smallest size of women's clothing / (informal) A woman with a very low body mass index, especially such a fashion model