foster

adjective
fos·​ter | \ ˈfȯ-stər How to pronounce foster (audio) , ˈfä-\

Definition of foster

 (Entry 1 of 4)

: affording, receiving, or sharing nurture or parental care though not related by blood or legal ties They are foster parents to three foster children.

foster

verb
fostered; fostering\ ˈfȯ-​st(ə-​)riŋ How to pronounce fostering (audio) , ˈfä-​ \

Definition of foster (Entry 2 of 4)

transitive verb

1 : to give parental care to : nurture They are considering fostering a child.
2 : to promote the growth or development of : encourage fostered the college in its early years policies that foster competition

Foster

biographical name (1)
Fos·​ter | \ ˈfȯ-stər How to pronounce Foster (audio) , ˈfä-\

Definition of Foster (Entry 3 of 4)

Stephen Collins 1826–1864 American songwriter

Foster

biographical name (2)

Definition of Foster (Entry 4 of 4)

William Z(ebulon) 1881–1961 American Communist

Keep scrolling for more

Other Words from foster

Verb

fosterer \ ˈfȯ-​stər-​ər How to pronounce fosterer (audio) , ˈfä-​ \ noun

Examples of foster in a Sentence

Verb

Such conditions foster the spread of the disease. Would you consider fostering a child?

First Known Use of foster

Adjective

before the 12th century, in the meaning defined above

Verb

12th century, in the meaning defined at sense 1

History and Etymology for foster

Adjective and Verb

Middle English, from Old English fōstor-, from fōstor food, feeding; akin to Old English fōda food

Keep scrolling for more

Learn More about foster

Dictionary Entries near foster

fossor

fossorial

fossulate

foster

Foster

fosterage

foster care

Statistics for foster

Look-up Popularity

Time Traveler for foster

The first known use of foster was before the 12th century

See more words from the same century

Keep scrolling for more

More Definitions for foster

foster

adjective

English Language Learners Definition of foster

 (Entry 1 of 2)

used to describe a situation in which for a period of time a child lives with and is cared for by people who are not the child's parents

foster

verb

English Language Learners Definition of foster (Entry 2 of 2)

: to help (something) grow or develop
: to provide the care that a parent usually gives to a child : to be or become the foster parent of a child

foster

adjective
fos·​ter | \ ˈfȯ-stər How to pronounce foster (audio) \

Kids Definition of foster

 (Entry 1 of 2)

: giving, receiving, or offering parental care even though not related by blood or legal ties a foster parent a foster child a foster home

foster

verb
fostered; fostering

Kids Definition of foster (Entry 2 of 2)

1 : to give parental care to
2 : to help the growth and development of We're trying to foster a sense of responsibility.

foster

adjective
fos·​ter

Legal Definition of foster

 (Entry 1 of 2)

: affording, receiving, or sharing nurture or parental care though not related by blood or legal relationships a foster child a foster parent
fostered; fostering

Legal Definition of foster (Entry 2 of 2)

: to give parental care to

Keep scrolling for more

More from Merriam-Webster on foster

Rhyming Dictionary: Words that rhyme with foster

Thesaurus: All synonyms and antonyms for foster

Spanish Central: Translation of foster

Nglish: Translation of foster for Spanish Speakers

Britannica English: Translation of foster for Arabic Speakers

Comments on foster

What made you want to look up foster? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a usually brief trip or an expedition

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!