—adj.
1 upright, vertical.
2 (of the penis, clitoris, or nipples) enlarged and rigid, esp. in sexual excitement.
3 (of hair) bristling, standing up from the skin.
—v.tr.
1 raise; set upright.
2 build.
3 establish (erect a theory).
Derivatives:
erectable adj. erectly adv. erectness n. erector n.
Etymology: ME f. L erigere erect- set up (as E-, regere direct)
Useful english dictionary. 2012.