noun

• Someone or something which selects or chooses.
• (cricket) An administrator responsible for selecting which players will play for a side.
• (computing) A matching expression in a stylesheet determining which elements in the markup are affected by a style.
• (computing) A pointer to a structure describing a segment of memory.
• (Internet, historical) A text string transmitted to a Gopher server, identifying the resource to be retrieved.
• (music) A disc jockey.
• (Australia, historical) A person who is entitled to choose a tract of Crown land to purchase.