The erection of something is the act of building it or placing it in an upright position. the erection of temporary fencing to protect hedges under repair
The act of erecting, or raising upright; the act of constructing, as a building or a wall, or of fitting together the parts of, as a machine; the act of founding or establishing, as a commonwealth or an office; also, the act of rousing to excitement or courage
{i} rigid and erect state of a bodily organ (especially the penis or clitoris); act of raising, act of setting up; construction, act of building; something which has been built