noun A monocotyledonous plant (Allium cepa), allied to garlic, used as vegetable and spice.
noun The bulb of such a plant.
My eyes are stinging from the chopped onions.
noun Any of various plants, mostly of the genus Allium, that are more or less similar to Allium cepa.
Many onions are delicious; domesticated onions such as Allium cepa and Allium fistulosum are especially good, but even wild onions such as Allium canadense and Allium validum are nice in small doses.
noun Of a drug, an ounce.
noun A ball.
noun A watch-seal.
noun Alternative letter-case form of Onion (“an inhabitant of Bermuda; a Bermudian”).
noun Soy, particularly when used in compound words related to the soy boy stereotype.