- 1[countable] if a man has an erection, his penis is stiff because he is sexually excited to get/have an erection
- 2[uncountable] (formal) the act of building something or putting it in a vertical position the erection of scaffolding around the building
- 3[countable] (formal) a structure or building, especially a large one The café was a bleak, concrete erection with plastic tables and chairs.
Check pronunciation: erection