'Fireweed' definitions:

Definition of 'fireweed'

(from WordNet)
noun
Tall North American perennial with creeping rootstocks and narrow leaves and spikes of pinkish-purple flowers occurring in great abundance in burned-over areas or recent clearings; an important honey plant [syn: fireweed, giant willowherb, rosebay willowherb, wickup, Epilobium angustifolium]
noun
An American weedy plant with small white or greenish flowers [syn: fireweed, Erechtites hieracifolia]

Definition of 'Fireweed'

From: GCIDE
  • Fireweed \Fire"weed`\, n. (Bot.) (a) An American plant (Erechthites hiercifolia), very troublesome in spots where brushwood has been burned. (b) The great willow-herb (Epilobium spicatum). [1913 Webster]