/ Dictionary / Index K Klamath weed: Meaning and Definition of Find definitions for: Klam'ath weed" Pronunciation: [key] the St.-John's-wort, Hypericum perforatum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Klamath Lakes Klan Related Content Daily Word Quiz: wary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language