Reinforcement is a consequence that will strengthen an organism's future behavior whenever that behavior is preceded by a specific antecedent stimulus.

Reinforcement may also refer to:

• Reinforcement (speciation)
• Reinforcement bar or rebar, a steel bar or mesh of steel wires used as a tension device
• Reinforcement learning, an area of machine learning inspired by behaviorist psychology
  • "REINFORCE", a policy gradient method (often used as PPO)
• Reinforcements in military operations

• Stiffening
• All pages with titles containing Reinforcement