Definitions for emotionɪˈmoʊ ʃən

Random House Webster's College Dictionary

e•mo•tion^*ɪˈmoʊ ʃən(n.)

an affective state of consciousness in which joy, sorrow, fear, etc., is experienced, as distinguished from cognitive and volitional states of consciousness.
any of the feelings of joy, sorrow, hate, love, etc.
a strong agitation of the feelings caused by experiencing love, fear, etc.

^* Syn: See feeling.

Origin of emotion:

1570–80; appar. < MF esmotion, derived on the model of movoir: motion, from esmovoir to set in motion, move the feelings < VL *exmovēre, for L ēmovēre; see e -, move , motion

e•mo′tion•less(adj.)

Princeton's WordNet

emotion(noun)
any strong feeling

Kernerman English Learner's Dictionary

emotion(noun)ɪˈmoʊ ʃən
a feeling or sentiment
He's not good at expressing his emotions.

Wiktionary

emotion(Noun)
A person's internal state of being and involuntary physiological response to an object or a situation, based on or tied to physical state and sensory data.
emotion(Noun)
A reaction by an non-human organism with behavioral and physiological elements similar to a person's response.

Origin: From émotion, from émouvoir based on Latin emotus, past participle of emovo, from e- (variant of ex-), and movo.

Webster Dictionary

Emotion(noun)
a moving of the mind or soul; excitement of the feelings, whether pleasing or painful; disturbance or agitation of mind caused by a specific exciting cause and manifested by some sensible effect on the body