The definition of instinct is something you just know or sense.(noun)
When a dog gives birth to puppies and immediately just begins to nurse, this is an example of when the mother dog acts on instinct.
See instinct in Webster's New World College Dictionary
Origin: < L instinctus, pp. of instinguere, to impel, instigate < in-, in + *stinguere, to prick: for IE base see stick
See instinct in American Heritage Dictionary 4
Origin: Middle English
Origin: , from Latin īnstīnctus, impulse
Origin: , from
Origin: past participle of īnstinguere, to incite
Origin: : in-, intensive pref.; see in-2
Origin: + stinguere, to prick; see steig- in Indo-European roots.
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