— invigilation , n. — invigilator , n.
/in vij"euh layt'/ , v.i. , invigilated, invigilating .
1. to keep watch.
2. Brit. to keep watch over students at an examination.
[ 1545-55; invigilatus (ptp. of invigilare to keep watch, stay up late), equiv. to in- IN- 2 + vigila- (s. of vigilare to watch; see VIGIL) + -tus ptp. suffix ]