unity

noun

1. 1

   the quality of being united into one

2. 2

   the smallest whole number 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. 3

   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