Point wand at target
Erects a structure
- "...Erecto!" she added, pointing her wand at the misshapen canvas, which in one fluid motion rose into the air and settled, fully constructed, on to the ground before Harry, out of whose startled hands a tent peg soared, to land with a final thud at the end of a guy rope."
Behind the scenes
- Erecting a tent is the only known use in the series, but it could presumably be used to erect any structure given that the required materials were present.
Erectum is past participle of erigere, a Latin verb meaning "to erect".