1. (noun, botanical) A growth process whereby a plant sheath or stem segment grows back on itself, essentially turning itself inside out.
2. (noun, CIA/FBI/NSA) An interrogation process whereby a suspect is bent back on himself or herself, essentially turning them inside out.
3. (noun) An intercourse process whereby a body part or prop (e.g., vibrator, cell phone, TV remote, etc) is placed into the vagina.
4. (cartographical) On Olde Worlde Mappes by Iohn Speede, c. 1626, this term meant "having taken one's leave to abscond to Amazonia". Literally "within a country of vaginas".
1. David Attenborough: "But once the fly trap is fed a piece of meat, time-lapse photography demonstrates a dramatic change in growth. By the third invagination, the Venus fly trap has already offered up two new leaves."
2. John Ashcroft: "But once the Eye-rackie is tied to the rack, time-lapse photography demonstrates a dramatic change in growth. By the third invagination, the Taliban suspect has already offered up three new accomplices. Even better, by the fourth invagination, he was no longer able to speak or make any noise at all. A good day's work for the NSA."
3. HMB: "Dude, your aunt is really starting to freak me out. Last time we made out, she suggested invagination, and I agreed. But she made me wrap a brick in cellophane and stick it up her pussy. You don't pay me enough for this sort of crap. I'm going back to Taco Bell."
4. When the American troops arrived in Hanoi to reinforce the ARVN troops there, they quickly learned the skills to stay alive, including camouflage, mine detection, and most importantly, avoiding the major fighting from the vantage point of an observatory invagination - often in groups.
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