Easton's Bible Dictionary

Of the Hebrews in the wilderness, called forth the displeasure of God, which was only averted by the earnest prayer of Moses (Numbers 11:33, 34; 12; 14:27, 30, 31; 16:3; 21:4-6; Psalm 106:25). Forbidden by Paul (1 Corinthians 10:10).

Noah Webster's New International Dictionary of the English Language

1. (p. pr. & vb. n.) of Murmur.

2. (a. & n.) Uttering murmurs; making low sounds; complaining.