<p><strong>Verb</strong></p><ul><li>(used with object)<ul><li>to act on; produce an effect or change in: Cold weather affected the crops.</li><li>Synonyms: alter, modify, sway, influence</li><li>to impress the mind or move the feelings of: The music affected him deeply.</li><li>Synonyms: stir, touch</li><li>(of pain, disease, etc.) to attack or lay hold of.</li></ul></li></ul><p><strong>Noun</strong></p><ul><li>Psychology: feeling or emotion.</li><li>Psychiatry: an expressed or observed emotional response: Restricted, flat, or blunted affect may be a symptom of mental illness, especially schizophrenia.</li><li>Obsolete: affection; passion; sensation; inclination; inward disposition or feeling.</li></ul>