The erratic movement of air masses in the absence of any visual cues, especially such movement that causes unexpected turbulence to an aircraft.

(call center jargon) A caller who hangs up immediately when they hear a delay announcement.

(nautical) A circular disc of plate glass, set into the screen of a ship's bridge and spun at high speed by an electric motor in heavy rain or snow; it offers a clear view forward.

(finance) A nationwide electronic funds transfer system that provides for interbank clearing of electronic payments, such as credit-card transactions. An ACH transaction is an electronic fund transfer through the Federal Reserve Bank from a checking or savings account.

plural of automated clearing house

Forcibly, sometimes mutedly, expelling air from one's lungs, sometimes to clear mucus, sometimes to attract attention to something; less vigorous than coughing.

(law) A legal standard for deciding the outcome of a dispute: evidence that clearly indicates that a claim is more likely to be true than not, without needing to eliminate all doubt.

To prove the innocence of a person previously considered or suspected to be guilty.

(sports, idiomatic) To clear the ball away from a dangerous position.

(UK politics) An obvious, unambiguous divide between the policies of two parties.