Noah Webster's Dictionary 1. (n.) Watchfulness in respect of danger; care; caution; circumspection. 2. (n.) The quality or state of being vigilant; forbearance of sleep; wakefulness. 3. (n.) Guard; watch.

Multi-Version Concordance Vigilance (1 Occurrence) Proverbs 4:23 And keep watch over your heart with all care; so you will have life. (See RSV)