e ‧ rec ‧ tion /ɪˈrekʃ ə n/ BrE AmE noun
1 . [countable] if a man has an erection, his ↑ penis increases in size and becomes stiff and upright because he is sexually excited
have/get an erection
2 . [uncountable] the act of building something or putting it in an upright position
erection of
the erection of a new temple