unity

(noun) an undivided or unbroken completeness or totality with nothing wanting. Synonyms: integrity, wholeness. Examples: "The integrity of the nervous system is required for normal development." "He took measures to insure the territorial unity of croatia."

(noun) the smallest whole number or a numeral representing this number. Synonyms: one, 1, I, ace, single. Examples: "He has the one but will need a two and three to go with it." "They had lunch at one."

(noun) the quality of being united into one. Synonyms: oneness.