dentist

someone whose job is to treat people’s teeth
  the dentist/the dentist’s (=the place where a dentist works)
   • I’m going to the dentist this afternoon.
     • • •

THESAURUS

   ▪ dentist someone whose job is to treat people's teeth: • I've made an appointment with the dentist. | • She always dreaded a visit to the dentist.
   ▪ oral surgeon a dentist who has special training to operate on people's teeth
   ▪ orthodontist a dentist who makes teeth straight when they have not been growing correctly
   ▪ dental hygienist/hygienist someone who is specially trained to help a dentist by cleaning teeth and giving advice about how to keep teeth healthy: • Ask your dental hygienist for advice on using floss.
   ▪ dental practitioner formal a dentist

Oxford Advanced Learner's Dictionary

dentist

den·tist [dentist dentists] [ˈdentɪst] [ˈdentɪst] noun

1. (also formal ˈdental surgeon) a person whose job is to take care of people's teeth

2. dentist's a place where a dentist sees patients

• an appointment at the dentist's

Cambridge Advanced Learner's Dictionary

dentist

dentist /ˈden.tɪst/ US /-ţɪst/
noun [C]
a person whose job is treating people's teeth:
You should have your teeth checked by a dentist at least twice a year.

dentistry /ˈden.tɪ.stri/ US /-ţɪ-/
noun [U]
the work of a dentist

dentist's /ˈden.tɪsts/ US /-ţɪsts/
noun [C] plural dentists
I've got to go to the dentist's (= the place where a dentist works) on Friday.

Collins COBUILD Advanced Learner’s English Dictionary

dentist

/dentɪst/
(dentists)

A dentist is a person who is qualified to examine and treat people’s teeth.
Visit your dentist twice a year for a check-up.

N-COUNT

The dentist or the dentist’s is used to refer to the surgery or clinic where a dentist works.
It’s worse than being at the dentist’s.

N-SING: the N

Merriam-Webster's Advanced Learner's Dictionary

Merriam-Webster's Advanced Learner's Dictionary:

dentist

den·tist /ˈdɛntəst/ noun, pl -tists [count]
1 : a person whose job is to care for people's teeth
• I have an appointment with my dentist today. = I have a dentist appointment today.
2 the dentist or the dentist's : the place where a dentist works
• I saw her at the dentist last week.
• He goes to the dentist's for a check-up every six months.