1. (noun)integrity, unity, wholeness an undivided or unbroken completeness or totality with nothing wanting
"the integrity of the nervous system is required for normal development"; "he took measures to insure the territorial unity of Croatia"
2. (noun)one, 1, I, ace, single, unity the smallest wholenumber or a numeral representing this number "he has the one but will need a two and three to go with it"; "they had lunch at one"
3. (noun)oneness, unity the quality of being united into one