A person who supervises students during an examination; a proctor(noun)
A person who supervises a gallery at a museum.(noun)
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Use "invigilator" in a sentence
"A complaint from an "exams invigilator" has caused Carol Ann Duffy's poem "Education for Leisure" to be removed from the U. K.'s GCSE curriculum."
"Words are celebrated in vocabularic feats -- Page 117 alone delights a word-lover with "syzygy," "invigilator" and "fusee.""
"Then he mentions my 'syntax': well he could not possibly be at fault in that department - as an invigilator of others he must have meant the capital ‘G’."