Dictionary.net

• The fourth Sunday of Lent; - so named from the Latin word Laetare (rejoice), the first word in the antiphone of the introit sung that day in the Roman Catholic service.

2010 - New Age Dictionary Database
By Oddity Software

• The fourth Sunday of Lent; - so named from the Latin word Laetare (rejoice), the first word in the antiphone of the introit sung that day in the Roman Catholic service.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.