Definitions
1.adjective(of an object) Rigid; hard to bend; inflexible.
2.adjective(of policies and rules and their application and enforcement) Inflexible; rigid.
3.adjective(of a person) Formal in behavior; unrelaxed.
4.adjectiveHarsh, severe."He was eventually caught, and given a stiff fine."
5.adjective(of muscles or parts of the body) Painful as a result of excessive or unaccustomed exercise."My legs are stiff after climbing that hill yesterday."
6.adjectivePotent."a stiff drink; a stiff dose; a stiff breeze."
7.adjectiveDead, deceased.
8.adjective(of a penis) Erect.
9.adjective(of whipping cream or egg whites) Beaten until so aerated that they stand up straight on their own."beat the egg whites until they are stiff"
10.adjectiveOf an equation: for which certain numerical solving methods are numerically unstable, unless the step size is taken to be extremely small.
11.adjectiveKeeping upright.