instinct

An instinct is something you don't need to learn — it happens naturally, without you even thinking about it. Babies cry by instinct, and ducks follow their mother by instinct.

Animals and humans learn a lot of things from other animals and humans. But if there isn't any learning involved, then the behavior is an instinct. Instincts come naturally, like a baby's desire to feed. Some behaviors are a combination of instinct and learned behavior, like language. Others happen without any teaching at all, like the instinct to run when you see a big, hungry looking bear. When you see the word instinct, think natural response.

Definitions of instinct
1

n inborn pattern of behavior often responsive to specific stimuli

“the spawning instinct in salmon”
“altruistic instincts in social animals”
Synonyms:
inherent aptitude
Types:
id
(psychoanalysis) primitive instincts and energies underlying all psychic activity
Type of:
aptitude
inherent ability

adj (followed by `with')deeply filled or permeated

“words instinct with love”
Synonyms:
replete
full
containing as much or as many as is possible or normal

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