ALL meanings of know one's onions
on·ion
K k - noun know one's onions a plant, Allium cepa, of the amaryllis family, having an edible, succulent, pungent bulb. 1
- noun know one's onions any of certain similar plants. 1
- noun know one's onions the bulb of the onion plant. 1
- noun know one's onions the flavor or odor of this bulb. 1
- noun know one's onions Slang. a person: He's a tough onion. 1
- adjective know one's onions containing or cooked with onions: onion soup. 1
- adjective know one's onions of, relating to, or resembling an onion. 1
- idioms know one's onions know one's onions, Slang. to know one's subject or business thoroughly; be capable or proficient. 1
- noun know one's onions to be fully acquainted with a subject 0
- verb know one's onions To be knowledgeable and competent about a particular subject or task. 0