Etymology
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lodestar (n.)

late 14c. (late 13c. as a surname), "a star that leads or serves to guide," an old name for the pole star as the star that "leads the way" in navigation; from lode (n.) "a way, a course, something to be followed" (a Middle English variant spelling of load (n.) that preserved the original Old English sense of that noun) + star (n.). Figurative use from late 14c. Compare lodestone. Similar formation in Old Norse leiðarstjarna, German Leitstern, Danish ledestjerne.

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Definitions of lodestar

lodestar (n.)
guiding star; a star that is used as a reference point in navigation or astronomy;
Synonyms: loadstar
lodestar (n.)
something that serves as a model or guide;
Synonyms: loadstar
From wordnet.princeton.edu