Pronunciation: (spēch'lis), [key]
1. temporarily deprived of speech by strong emotion, physical weakness, exhaustion, etc.: speechless with alarm.
2. characterized by absence or loss of speech: speechless joy.
3. lacking the faculty of speech; dumb.
4. not expressed in speech or words: speechless compliments.
5. refraining from speech.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.