alliance

noun

al·​li·​ance ə-ˈlī-ən(t)s 

1

a

: the state of being allied : the action of allying

nations in close alliance

b

: a bond or connection between families, states, parties, or individuals

a closer alliance between government and industry

2

: an association to further the common interests of the members

specifically : a confederation of nations by treaty

the alliance of Western nations

3

: union by relationship in qualities : affinity

an alliance of industry and academia

4

: a treaty of alliance

Synonyms of alliance

• treaty
• pact

Examples of alliance in a Sentence

We need to form a closer alliance between government and industry.

strengthen the alliance of western nations

There has been a pattern of shifting alliances in the political world.

The article condemns what some say is an unholy alliance between government and media.

one nation working in alliance with another

There is disagreement within the alliance about how to deal with this problem.

Recent Examples on the Web

In state elections this month an alliance led by above-ground communist parties was voted out in the southern state of Kerala, the first time in decades that Marxist political parties are not in power in any of India’s states or territories. —Dhruv Tikekar, CNN Money, 30 May 2026

The traditional political alliances are frayed, at best, with socialists backing a billionaire and Trump supporting an immigrant. —Philip Elliott, Time, 30 May 2026

The incursion added to concerns that the war could spread across the alliance's borders. —Arkansas Online, 30 May 2026

Armed with an adventure kit, participants are summoned to a secret location where they’re tasked with deciphering cryptic codes, uncovering hidden symbols, navigating shifting alliances and outwit enemies and operatives stationed around the campus. —Pam Kragen, San Diego Union-Tribune, 29 May 2026

Word History

First Known Use

13th century, in the meaning defined at sense 1a

Rhymes for alliance

• science
• appliance
• compliance
• defiance
• reliance
• geoscience
• neuroscience
• noncompliance
• pseudoscience

Kids Definition

alliance

noun

al·​li·​ance ə-ˈlī-ən(t)s 

1

: the state of being allied

2

a

: a union between persons, families, or parties

b

: a union between nations for assistance and protection

3

: a treaty of alliance

Geographical Definition

Alliance

geographical name

Al·​li·​ance ə-ˈlī-ən(t)s 

city in northeastern Ohio northeast of Canton population 22,322