from Wiktionary, Creative Commons Attribution/Share-Alike License
- interj. A devout salutation often used as a prelude to certain set prayers; the traditional response is Et cum spiritu tuo.
From Latin dominus vobiscum ‘the lord be with you’, apparently taken from the Bible (e.g. Ruth 2:4 ‘And behold, Boaz came from Bethlehem, and said unto the reapers, The LORD be with you. And they answered him, The LORD bless thee’). (Wiktionary)