noun

• A very high mountain. Specifically, one of the Alps, the highest chain of mountains in Europe.
• An alpine meadow
• (Australia) Initialism of Australian Labor Party.
• Initialism of arm's length principle. [The principle that the parties in a transaction should be independent and on an equal footing, without any favorable treatment, fiduciary duties, etc.]
• Acronym of axion-like particle.
• (biochemistry) Initialism of alkaline phosphatase. [(biochemistry) Any of a group of phosphatases that are most active in an alkaline environment]