Pronunciation: (ni-pen'thē), [key]
1. a drug or drink, or the plant yielding it, mentioned by ancient writers as having the power to bring forgetfulness of sorrow or trouble.
2. anything inducing a pleasurable sensation of forgetfulness, esp. of sorrow or trouble.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.