noun. An evil spell; a curse.

noun. One that brings bad luck.

transitive verb. To put a hex on.

transitive verb. To bring or wish bad luck to.

adjective. Hexagonal. Used of hardware, such as bolts and screws, with hexagonal heads or hexagonal sockets.

noun. Short for hexadecimal.

verb. To put a hex (a spell, especially an evil spell) on.

noun. An evil spell or curse.

noun. A witch.

noun. A spell (now rare but still found in compounds such as hex sign and hexcraft).