Definition of "affect"

affect¹

/əˈfɛkt/

verb
third-person singular simple present affects, present participle affecting, simple past and past participle affected
1. (transitive) To influence or alter.
2. (transitive) To move to emotion.
3. (transitive, pathology) Of an illness or condition, to infect or harm (a part of the body).
4. (transitive, archaic) To dispose or incline.
5. (transitive, archaic) To tend to by affinity or disposition.
6. (transitive, archaic) To assign; to appoint.
7. (transitive, Scotland, law) To burden (property) with a fixed charge or payment, or other condition or restriction.

affect²

/əˈfɛkt/

verb
third-person singular simple present affects, present participle affecting, simple past and past participle affected
1. (transitive) To make a show of; to put on a pretense of; to feign; to assume. To make a false display of.
2. (obsolete, transitive) To aim for, to try to obtain.
3. (transitive, rare) To feel affection for (someone); to like, be fond of.
4. (transitive, obsolete) To show a fondness for (something); to choose.

affect³

/ˈæ.fɛkt/

noun
plural affects
1. (psychology) A subjective feeling experienced in response to a thought or other stimulus; mood, emotion, especially as demonstrated in external physical signs.
2. (obsolete) One's mood or inclination; mental state.
3. (obsolete) A desire, an appetite.