Meaning of BIOLOGICAL in English

BIOLOGICAL

bi ‧ o ‧ lo ‧ gi ‧ cal /ˌbaɪəˈlɒdʒɪk ə l◂ $ -ˈlɑː-/ BrE AmE adjective

1 . relating to the natural processes performed by living things:

the biological functions of the body

Depression is both biological and psychological.

2 . biological weapons/warfare/attack etc weapons, attacks etc that involve the use of living things, including ↑ bacteria , to harm other living things:

a ban on chemical and biological weapons

3 . [only before noun] relating to biology:

the biological sciences

4 . biological parent/father/mother etc a child’s parent through birth, rather than through ↑ adoption

—biologically /-kli/ adverb

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.