Definition of: insufflation

(in′sə·flā′shən) noun
1. The act or process of blowing or breathing upon or into.
2. Eccl. A breathing upon a person or thing as symbolic of the operation and entrance of the Holy Spirit, or the casting out of unclean spirits, as in some churches in the ordinance of baptism for the purification of catechumens.
3. Med. A forcible blowing, as of air into the lungs, or of a gas, vapor, or powder into some opening or cavity of the body. [<LL insufflatio, -onis]