1. The act of involving. 2. The state of being involved. 3. Intricacy; complexity. 4. Something, such as a long grammatical construction, that is intricate or complex. 5. The multiplying of a quantity by itself a specified number of times; the raising to a power. 6. The ingrowth and curling inward of a group of cells, as in the formation of a gastrula from a blastula. 7. A decrease in size of an organ, as of the uterus following childbirth. 8. A progressive decline or degeneration of normal physiological functioning occurring as a result of the aging process.
