Dictionary

stimulus

noun stim·u·lus \ˈstim-yə-ləs\

: something that causes something else to happen, develop, or become more active

: something that causes a change or a reaction

plural stim·u·li\-ˌlī, -ˌlē\

Full Definition of STIMULUS

:  something that rouses or incites to activity: as
a :  incentive
b :  stimulant 1
c :  an agent (as an environmental change) that directly influences the activity of a living organism or one of its parts (as by exciting a sensory organ or evoking muscular contraction or glandular secretion)

Examples of STIMULUS

  1. The pay raise was a stimulus for production.
  2. Heat and light are physical stimuli.
  3. The dog responded to the stimulus of the ringing bell.

Origin of STIMULUS

Latin
First Known Use: 1684

Rhymes with STIMULUS

STIMULI Defined for Kids

stimulus

noun stim·u·lus \ˈsti-myə-ləs\
plural stim·u·li \-ˌlī, -ˌlē\

Definition of STIMULUS for Kids

1
:  something that stirs or urges to action <The reward was a stimulus for greater effort.>
2
:  an influence that acts usually from outside the body to partly change bodily activity (as by exciting a receptor or sense organ) <Light, heat, and sound are common physical stimuli.>
Medical Dictionary

stimulus

noun stim·u·lus \ˈstim-yə-ləs\
plural stim·u·li \-ˌlī, -ˌlē\

Medical Definition of STIMULUS

1
:  stimulant 1
2
:  an agent (as an environmental change) that directly influences the activity of living protoplasm (as by exciting a sensory organ or evoking muscular contraction or glandular secretion) <a visual stimulus>

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