United Nations

American  

[yoo-nahy-tid ney-shuhnz] / yuˈnaɪ tɪd ˈneɪ ʃənz /

noun

1. (used with a singular verb,) the United Nations an international organization, with headquarters in New York City, formed to promote international peace, security, and cooperation under the terms of the charter signed by 51 founding countries in San Francisco in 1945, and since then by many more countries. UN, U.N.

2. (used with a plural verb) the nations that signed the joint declaration in Washington, D.C., January 2, 1942, pledging to employ full resources against the Axis powers, not to make a separate peace, etc.

---

United Nations British  

noun

1.  UN.  an international organization of independent states, with its headquarters in New York City, that was formed in 1945 to promote peace and international cooperation and security

2. (in World War II) a coalition of 26 nations that signed a joint declaration in Jan 1942, pledging their full resources to defeating the Axis powers

---

United Nations Cultural  

1. An organization that includes virtually all countries in the world, with nearly 190 member nations. Its General Assembly, in which each member nation has one vote, guides policies and finances generally. Another important division of the United Nations is the Security Council, in which five powerful nations have a majority; the Security Council is charged with solving crises and keeping peace. The United Nations also includes an Economic and Social Council; a Secretariat, or administrative division; and the International Court of Justice, or World Court. It also is allied with several agencies that operate independently, such as the United Nations Educational, Scientific, and Cultural Organization (UNESCO), the World Bank, the World Health Organization (WHO), and the United Nations Children's Fund (UNICEF).

---

Discover More

The Korean War was officially fought by the United Nations against North Korea.

The United Nations was formed after World War II as a successor to the League of Nations and has served as a forum for many international disputes, notably the Arab-Israeli conflict and the Cuban missile crisis. It also engages in peacekeeping operations by sending lightly armed detachments of soldiers from neutral nations to supervise cease-fires between combatants. Through the United Nations High Commissioner for Refugees (UNHCR), it provides aid for those uprooted by war or famine.

The headquarters of the U.N. are in Manhattan. Some of its affiliates, however, are centered elsewhere. The International Court of Justice sits in The Hague. UNHCR is headquartered in Geneva, and UNESCO in Paris.

A twenty-eight nation coalition of United Nations member states opposed Iraq's invasion of Kuwait in 1990. (See Persian Gulf War.)

Compare meaning

How does united-nations compare to similar and commonly confused words? Explore the most common comparisons:

• League of Nations vs. United Nations

Example Sentences

On Thursday, a United Nations committee concluded that Mexico’s disappearance crisis constituted “crimes against humanity” and took what it called the “exceptional step” of forwarding the matter to the General Assembly.

From Los Angeles Times • Apr. 6, 2026

"We have prepared all the rights and entitlements that must be given to the fallen soldiers. Among these is compensation from the United Nations," Agus said after attending Zulmi’s funeral.

From Barron's • Apr. 5, 2026

Land once planted with crops now holds buildings such as the United Nations headquarters and the embassy of the United States.

From BBC • Apr. 3, 2026

The U.A.E. is lobbying for a United Nations Security Council resolution that would authorize such action, the officials said.

From The Wall Street Journal • Apr. 1, 2026

On the morning following our arrival, I went downstairs to the cafeteria, where fifty-seven children from twenty-three countries were waiting to have breakfast and to begin the United Nations First International Children’s Parliament.

From "A Long Way Gone: Memoirs of a Boy Soldier" by Ishmael Beah