adjective

1. not bending or leaning; straight up; upright; vertical
2. sticking out or up; bristling; stiff
3. Archaic
   1. not depressed; uplifted
   2. alert

Etymology: ME < L erectus, pp. of erigere, to set up < e-, out, up + regere, to make straight: see right

transitive verb

1. to raise or construct (a building, etc.)
2. to set up; cause to arise to erect arbitrary social barriers
3. to set in an upright position; raise
4. to set up; assemble
5. Archaic to establish; found
6. Geom. to construct or draw (a perpendicular, figure, etc.) upon a base line
7. Physiol. to cause to become swollen and rigid by being filled with blood