adj. & v.
--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)