9 Grammatical Pitfalls
mid-15c., "establishment; advancement," from Late Latin erectionem (nominative erectio), noun of action from past participle stem of erigere (see erect (adj.)). Meaning "the putting up" (of a building, etc.), "stiffening of the penis" are both from 1590s.
erection e·rec·tion (ĭ-rěk'shən)
The firm and enlarged condition of a body organ or part when the erectile tissue surrounding it becomes filled with blood, especially such a condition of the penis or clitoris.
The process of filling with blood.