待合室って英語でなんて言うの？

Waiting room is the correct term when talking about a place you sit while you wait to see a doctor, or wait for your vehicle to be serviced, etc. When talking about the place we wait for a bus, airplane, or train we usally say we are waiting on the platform, in the terminal, or at the station. Example sentences "Please sit in the waiting room. The nurse will call you shortly." "You can sit in the waiting room while we install a new tire." "Tom called me from the subway platform where he was waiting for his train." "My flight was delayed and I was stuck waiting in the terminal."

A room that people wait in for a bus, train, at the hospital, etc is known as a 'waiting room'. You may add the purpose of the waiting room also if the context isn't clear: hospital waiting room, bus station waiting room, train station waiting room etc.

The room where people can wait for a bus or train, or at the hospital is called a "waiting room". Usually there are seats. The name simply and literally means "the room where one waits". "Room" meaning a space or area of a building, and the verb "to wait" which means to spend time in the expectation of something. Many other rooms are described in this same form, such as "dining room" for eating, "living room" meaning lounge. Or "utility room", "boiler room" and "class room".

Waiting room would be the most commonly used word to describe a room where people can sit and wait.

We usually refer to an area in a building as a 'waiting room' such as in a hospital or dentist if we have to wait. When talking about the place we wait for a bus, airplane, or train we usually refer to these as a platform, in the terminal, or at the station. Example: "Your train will depart from platform 4".

when you want to say a word that explains a room in which people wait in, you can call it a "waiting room" or a "lobby" in some cases. For example, a hotel's waiting room or registration room is called a "lobby".

When you are waiting for something or for something to happen it might take a while so you might want to sit down the room you do this in is called the 'waiting room'

We call a room where we wait for service the foyer or waiting room. Usually, in this room, we will find reception or some kind of admin that can give us more information. We will find some seats to occupy while we wait to be serviced. For transport, we call this waiting area a station eg. train, bus "I will be waiting in the doctors waiting area." "Please meet me in the foyer." "Please make sure you are at the station at 3 pm"

When going to the hospital or doctor's office, you usually sit in a place called the "waiting room". These rooms will have seats and reading material like magazines, pamphlets, etc. You'll most likely hear nurses or secretaries at the window say "please have a seat in the waiting room" while you wait to be seen. Sometimes people will refer to the space where you wait a "waiting area". "Area" refers to the surroundings where you wait, and doesn't always have to be a room. It can just be a space where you stand to wait for something like the bus, train, etc.