/ ˈsɜːdʒəri; NAmE ˈsɜːrdʒ-/ noun ( pl. -ies )
1.
[ U ] medical treatment of injuries or diseases that involves cutting open a person's body and often removing or replacing some parts; the branch of medicine connected with this treatment :
major / minor surgery
to undergo heart surgery
He will require surgery on his left knee.
HELP NOTE : In American English the countable form can be used
She had three surgeries over ten days.
—see also open-heart surgery , plastic surgery
2.
[ U , C ] ( BrE ) the time during which a doctor, dentist or vet is available to see patients :
morning / afternoon / evening surgery
surgery hours
Is there a surgery this evening?
3.
[ C ] ( BrE ) ( NAmE office ) a place where a doctor, dentist or vet sees patients :
a doctor's / dentist's surgery
4.
[ C ] ( BrE ) a time when people can meet their Member of Parliament to ask questions and get help :
a constituency surgery
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WORD ORIGIN
Middle English : from Old French surgerie , contraction of serurgerie , from serurgien , based on Latin chirurgia , from Greek kheirourgia handiwork, surgery, from kheir hand + ergon work.