Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “active”

See all translations

active

adjective uk   /ˈæk.tɪv/ us  

active adjective (BUSY)

B1 busy with a particular activity: physically/mentally active You have to try to keep active as you grow older.
More examples

active adjective (INVOLVED)

B2 involved in a particular activity: Enemy forces remain active in the mountainous areas around the city. She's very active in (= involved in) local politics. Both of his parents were very politically active. It is important to educate children before they become sexually active. He takes a more active role in the team nowadays. She's an active member of her trade union (= not only belongs to it, but does work to help it).
More examples

active adjective (VOLCANO)

C1 An active volcano is one that might erupt (= throw out hot liquid rock or other matter) at any time.

active adjective (GRAMMAR)

B1 language An active verb or sentence is one in which the subject is the person or thing that performs the stated action: "Catrin told me" is an active sentence, and "I was told by Catrin" is passive.
More examples

active

noun [S] uk   /ˈæk.tɪv/ us  
the active →  the active voice
(Definition of active from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of active?
Add Cambridge dictionaries to your browser to your website

Definitions of “active” in other dictionaries

Word of the Day

nation

a country, especially when thought of as a large group of people living in one area with their own government, language, traditions, etc.

Word of the Day

Think long and hard; the language of decisions

by Liz Walter,
January 28, 2015
One of the best ways (perhaps the best way) to improve your English is to learn how words go together in phrases, idioms, or other patterns such as verb/noun or adjective/noun pairs (often called ‘collocations’). This blog looks at some useful phrases and collocations connected with the subject of decisions, something we

Read More 

micro pig noun

January 26, 2015
an extremely small pig, bred to be a pet Micro pigs have become popular pets recently, with famous owners including Victoria Beckham, Paris Hilton and Olympic diver, Tom Daley.

Read More