According to the search results, "three-way" can have different meanings depending on the context. Here are some possible definitions:
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Involving three people or groups: This is the most general definition of "three-way". For example, a three-way conversation, deal, partnership, or battle involves three people or groups.
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Allowing movement in any one of three directions: This definition is used in the context of a three-way intersection, where traffic can move in three different directions.
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Sexual activity involving three persons: This is a specific definition of "three-way" that refers to a threesome or ménage à trois.
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A serving of Cincinnati chili with spaghetti and cheese: In Cincinnati, "three-way" is also used to describe a particular way of serving chili).
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Other meanings: "Three-way" can also refer to a block cipher, a type of loudspeaker system, a type of electrical switch, and other things).
In summary, "three-way" can have different meanings depending on the context, but it generally involves the number three in some way.