The first letter of the Greek alphabet. In mathematics, alpha is often used to represent angles.
A dominant individual in a group, especially in a social animal group. The alpha of the wolf pack led the hunt.
The beginning or the first of something. The alpha version of the software was released for testing.
A measure of the active return on an investment, gauging the performance of an investment against a market index. The fund manager boasted a high alpha, indicating superior performance.
Alpha radiation or alpha particles collectively. The detector measured a burst of alpha from the sample.
The brightest star in a constellation, designated by the Greek letter α (alpha). Betelgeuse is Alpha Orionis, the brightest star in the constellation Orion.