Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “biological”

See all translations

biological

adjective uk   /ˌbaɪ.əˈlɒdʒ.ɪ.kəl/ us    /-ˈlɑː.dʒɪ-/
B2 connected with the natural processes of living things: the biological sciences Eating is a biological necessity! [before noun] related by birth: She decided to search for her biological mother after her adoptive parents died. UK used to describe a substance used for cleaning that uses enzymes to remove dirt: biological washing powder
Compare
using living matter, such as bacteria, to seriously harm and kill people and animals, and to damage crops: biological weapons/warfare
More examples
biologically
adverb uk   /-i/ us  
biologically active/stable chemicals
(Definition of biological from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of biological?
Add Cambridge dictionaries to your browser to your website

Definitions of “biological” in other dictionaries

Word of the Day

be as cold as ice

to be extremely cold

Word of the Day

Cleavage proves divisive in Cambridge’s words of 2014

by Alastair Horne,
December 19, 2014
​​​​ Other dictionaries may choose faddish novelties as their words of the year, but here at Cambridge, we like to do something different. We look for the words that have seen sudden surges in searches over the course of the year – words that have been baffling users of English and driven them

Read More 

cinderella surgery noun

December 15, 2014
cosmetic surgery to the feet We have all heard of people having nose jobs, boob jobs and liposuction – but now a new trend growing in popularity in America: Cinderella surgery.

Read More