Irritation vs. Annoy — What's the Difference?

Irritation, in biology and physiology, is a state of inflammation or painful reaction to allergy or cell-lining damage. A stimulus or agent which induces the state of irritation is an irritant.

To cause irritation to (another); make somewhat angry.

The act of irritating

(Archaic) To harass or disturb by repeated attacks.

The condition of being irritated; vexation

(transitive) To disturb or irritate, especially by continued or repeated acts; to bother with unpleasant deeds.

A source of irritation

(intransitive) To do something to upset or anger someone; to be troublesome.

An inflammatory reaction of a bodily part.

(transitive) To molest; to harm; to injure.

(Physiology) The elicitation of a response to a stimulus in a plant or animal organ or tissue, especially in a nerve or muscle.

A feeling of discomfort or vexation caused by what one dislikes.

The act of irritating or annoying

That which causes such a feeling.

The state of being irritated

To disturb or irritate, especially by continued or repeated acts; to tease; to ruffle in mind; to vex; as, I was annoyed by his remarks.

A things or person that annoys

To molest, incommode, or harm; as, to annoy an army by impeding its march, or by a cannonade.

(physiology) a state of inflammation or painful reaction to allergy or cell-lining damage.

A feeling of discomfort or vexation caused by what one dislikes; also, whatever causes such a feeling; as, to work annoy.

A condition of morbid excitability or oversensitiveness of an organ or part of the body; a state in which the application of ordinary stimuli produces pain or excessive or vitiated action.

Cause annoyance in; disturb, especially by minor irritations;

The act of irritating, or exciting, or the state of being irritated; excitement; stimulation, usually of an undue and uncomfortable kind; especially, excitement of anger or passion; provocation; annoyance; anger.

The act of exciting, or the condition of being excited to action, by stimulation; - as, the condition of an organ of sense, when its nerve is affected by some external body; esp., the act of exciting muscle fibers to contraction, by artificial stimulation; as, the irritation of a motor nerve by electricity; also, the condition of a muscle and nerve, under such stimulation.

A condition of morbid excitability or oversensitiveness of an organ or part of the body; a state in which the application of ordinary stimuli produces pain or excessive or vitiated action.

The psychological state of being irritated or annoyed

A sudden outburst of anger;

(pathology) abnormal sensitivity to stimulation;

The neural or electrical arousal of an organ or muscle or gland

An uncomfortable feeling in some part of the body

Unfriendly behavior that causes anger or resentment

The act of troubling or annoying someone