(aeronautics) The angle between the chord line of an airfoil and the airflow over it; one of the determiners of the amount of lift produced by an airfoil.

To attack in response to an attack by opponents.

(fencing) An attack that is intended to miss or fall short, so as to produce a reaction from the opponent. Also called a false action.

(computer security) An attempt to subvert security by recording legitimate communications and repeating them to try to impersonate a valid user.

(netball) A player allowed in the centre third, goal third including the shooting circle.

(netball) A player allowed in the centre third and goal third, but not the shooting circle.

(cryptography) A covert method of decryption exploiting the so-called birthday paradox.

(fencing) An attack consisting of more than one feint.

(medicine) An incident wherein a person who suffers intermittent experiences of bronchioconstriction undergoes such an experience, usually with a sudden onset.

(ice hockey) From one team's point of view, the area between the blue line of the other team's half of the rink and the end board behind the other team's goal.