1. A very short time (as the time it takes the eye to blink or the heart to beat)
   - flash, heartbeat, instant, jiffy, split second, trice, twinkling, wink, New York minute, jiff

Type of: bit, minute, mo, moment, second

• unknowing
• unknowingly
• unknowingness
• unknowledgeable
• unknown
• unknown quantity
• unknown region
• Unknown Soldier
• unlabeled
• unlabelled
• unlace
• unlaced
• unlade
• unladen
• unladylike
• unlamented
• unlash
• unlatch
• unlatched
• unlaureled
• unlaurelled
• unlawful
• unlawful carnal knowledge
• unlawfully
• unlawfulness