im·​plan·​ta·​tion | \ˌim-ˌplan-ˈtā-shən \

Definition of implantation 

1a : the act or process of implanting something

b : the state resulting from being implanted

2 in placental mammals : the process of attachment of the early embryo to the maternal uterine wall

Examples of implantation in a Sentence

Recent Examples on the Web

To allow the implantation and development of a fetus that could be construed as a foreign invader, the immune system needs to selectively ease its normal level of vigilance. Melissa Healy, The Seattle Times, "Pregnancy and childbirth may protect some women from developing dementia," 23 July 2018 The science behind this is sketchy at best — daily birth control pills, hormonal IUDs, and emergency contraception all work primarily by inhibiting fertilization of an egg, not by preventing implantation of a fertilized embryo. Anna North, Vox, "Kavanaugh’s description of birth control as “abortion-inducing drugs,” explained," 7 Sep. 2018 And though embryos with more than half abnormal cells had lower implantation and birth rates, the pregnancies still resulted in healthy births, suggesting the abnormal cells were either eliminated or repaired. Sumathi Reddy, WSJ, "IVF Testing Spurs a Debate Over ‘Mosaic’ Embryos," 21 Mar. 2018 These nonhormonal early versions probably worked by interfering with ovulation, fertilization, or implantation by causing mild inflammation of the endometrium. Carolyn Todd, Allure, "The History and Evolution of Birth Control in America," 12 July 2018 Two hybrid embryos have been frozen for future implantation, the researchers said. Ben Guarino, Washington Post, "‘Beautiful’ embryos created from near-extinct rhinoceros sperm," 4 July 2018 And total joint replacements may be infected during implantation, sometimes don’t function well and may cause pain. Bradley J. Fikes,, "Seeking financial security, Scripps Research is taking its science directly to patients," 24 June 2018 Nargund has since contributed to research showing that less hormonal stimulation produces better-quality eggs, though fewer, with a lower risk of chromosomal abnormality and a higher likelihood of implantation. Anna Louie Sussman,, "Falling Birthrates Call for More Accessible Fertility Treatment," 18 June 2018 This week, the agency revealed that five more deaths had been reported since last year’s warning, several of which were linked to perforations of the stomach wall after balloon implantation. Amanda Macmillan,, "12 People Have Died After Trying This Popular Weight-Loss Procedure. Here's What You Should Know," 7 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'implantation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of implantation

1578, in the meaning defined at sense 1a

Keep scrolling for more

Learn More about implantation

Share implantation

Statistics for implantation

Last Updated

5 Dec 2018

Look-up Popularity

Time Traveler for implantation

The first known use of implantation was in 1578

See more words from the same year

Keep scrolling for more

More Definitions for implantation


im·​plan·​ta·​tion | \ˌim-ˌplan-ˈtā-shən \

Medical Definition of implantation 

: the act or process of implanting or the state of being implanted: as

a : the placement of a natural or artificial tooth in an artificially prepared socket in the jawbone

b in placental mammals : the process of attachment of the embryo to the maternal uterine wall

called also nidation

c : medical treatment by the insertion of an implant

Keep scrolling for more

More from Merriam-Webster on implantation

Rhyming Dictionary: Words that rhyme with implantation

Spanish Central: Translation of implantation

Nglish: Translation of implantation for Spanish Speakers Encyclopedia article about implantation

Comments on implantation

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


living or existing for a long time

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
True or False

Test your knowledge - and maybe learn something along the way.

Word Winder's CrossWinder

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


Love words? Need even more definitions?

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