Definition of "germane"

Yet this much is germane to the present inquiry:

1924, W. D. Ross., translator, Aristotle, Metaphysics. Nashotah, Wisconsin, USA: The Classical Library, 2001, Book 1, Part 5.

Connors was addicted to this racquet and kept using it even after Wilson stopped making it, forfeiting millions in potential endorsement money by doing so. Connors was eccentric (and kind of repulsive) in lots of other ways, too, none of which are germane to this article.

1997, David Foster Wallace, “Tennis Player Michael Joyce’s Professional Artistry as a Paradigm of Certain Stuff About Choice, Freedom, Limitation, Joy, Grotesquerie, and Human Completeness”, in A Supposedly Fun Thing I'll Never Do Again, Kindle edition, Little, Brown Book Group

Valentine’s Day means different things for different people. For Homer, it means forking over a hundred dollars for a dusty box of chocolates at the Kwik-E-Mart after characteristically forgetting the holiday yet again. For Ned, it’s another opportunity to prove his love for his wife. Most germane to the episode, for Lisa, Valentine’s Day means being the only person in her entire class to give Ralph a Valentine after noticing him looking crestfallen and alone at his desk.

2012 August 5, Nathan Rabin, “TV: Review: THE SIMPSONS (CLASSIC): “I Love Lisa” (season 4, episode 15; originally aired 02/11/1993)”, in (Please provide the book title or journal name)‎