Source : Webster's Revised Unabridged Dictionary (1913)

Shallot \Shal*lot"\, n. [OF. eschalote (for escalone), F.
   ['e]chalote. See {Scallion}, and cf. {Eschalot}.] (Bot.)
   A small kind of onion ({Allium Ascalonicum}) growing in
   clusters, and ready for gathering in spring; a scallion, or
   eschalot.

Source : WordNet®

shallot
     n 1: aggregated bulb of the multiplier onion
     2: type of onion plant producing small clustered mild-flavored
        bulbs used as seasoning [syn: {eschalot}, {multiplier
        onion}, {Allium cepa aggregatum}, {Allium ascalonicum}]
     3: small mild-flavored onion- or garlic-like clustered bulbs
        used for seasoning