biological

adjective
bi·​o·​log·​i·​cal | \ ˌbī-ə-ˈlä-ji-kəl How to pronounce biological (audio) \
variants: or less commonly biologic \ ˌbī-​ə-​ˈlä-​jik How to pronounce biologic (audio) \

Definition of biological

1 : of or relating to biology or to life and living processes
2 : used in or produced by applied biology
3 : connected by direct genetic relationship rather than by adoption or marriage her biological father

Keep scrolling for more

Other Words from biological

biologically \ ˌbī-​ə-​ˈlä-​ji-​k(ə-​)lē How to pronounce biologically (audio) \ adverb

Synonyms & Antonyms for biological

Synonyms

birth, consanguineous, natural

Antonyms

adopted, adoptive, nonbiological

Visit the Thesaurus for More 

Examples of biological in a Sentence

the rights of the biological father in this case

Recent Examples on the Web

Sierra was adopted by the Harts with her biological older brothers, Jeremiah and Devonte. OregonLive.com, "Hart children's tiny bodies telegraphed warning that went unheeded by Oregon officials," 5 May 2018 The anonymous tipster said Hannah and her biological brother, Markis, bore the brunt of Jennifer Hart's discipline, but the girl made no mention of previous abuse to the Oregon social worker. Eliott C. Mclaughlin, CNN, "Oregon had Minnesota child abuse report before investigating Hart family," 25 Apr. 2018 He is survived by a young daughter and the biological brothers and sisters that he'd never met. Deanna Boyd, star-telegram, "Teen girl who hatched plan for home invasion that left young father dead gets 20 years," 26 Feb. 2018 Cruz and her husband, who died of a heart attack several years ago, adopted Nikolas and his biological brother, Zachary, after the couple moved from Long Island in New York to Broward County. Christal Hayes, USA TODAY, "Florida high school shooting suspect will plead guilty if death penalty is not an option," 16 Feb. 2018 Cruz and her husband, who died of a heart attack several years ago, adopted Nikolas and his biological brother, Zachary, after the couple moved from Long Island in New York to Broward County. CBS News, "Florida school shooting suspect charged with 17 counts of premeditated murder," 15 Feb. 2018 Cruz and her husband, who died of a heart attack several years ago, adopted Nikolas and his biological brother, Zachary, after the couple moved from Long Island in New York to Broward County. Terrry Spencer And Kelli Kennedy, Cincinnati.com, "School shooting suspect belonged to white nationalist group, leader says," 15 Feb. 2018 Cruz and her husband, who died of a heart attack several years ago, adopted Nikolas and his biological brother, Zachary, after the couple moved from Long Island in New York to Broward County. Time, "Florida School Shooting Suspect Charged With 17 Counts of Premeditated Murder," 15 Feb. 2018 Lynda and her husband, Roger, who died many years ago, adopted Nikolas and his biological brother, Zachary, after the couple moved from Long Island to Broward County. Stephen Hobbs, Sun-Sentinel.com, "Nikolas Cruz: Troubled suspect had been expelled from Marjory Stoneman Douglas High School," 14 Feb. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'biological.' 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 biological

1818, in the meaning defined at sense 1

Keep scrolling for more

Learn More about biological

Statistics for biological

Last Updated

17 May 2019

Look-up Popularity

Time Traveler for biological

The first known use of biological was in 1818

See more words from the same year

Keep scrolling for more

More Definitions for biological

biological

adjective

English Language Learners Definition of biological

: of or relating to biology or to life and living things
: related through birth

biological

adjective
bi·​o·​log·​i·​cal | \ ˌbī-ə-ˈlä-ji-kəl\

Kids Definition of biological

1 : of or relating to biology or to life and living things biological activity
2 : related by birth

biological

adjective
variants: also biologic

Medical Definition of biological

1 : of or relating to biology or to life and living processes
2 : used in or produced by applied biology
3 : related by direct genetic relationship rather than by adoption or marriage an adoptee who searched for years for her biological parents

Other Words from biological

biologically \ -​i-​k(ə-​)lē How to pronounce biologically (audio) \ adverb

Keep scrolling for more

Comments on biological

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

WORD OF THE DAY

a strong desire or propensity

Get Word of the Day daily email!

Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized drawing of woman pole vaulting across gap to get trophy
  • Which is a synonym of fuliginous?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

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!