have a lunch or have lunch?
Which one is correct, have a lunch or have lunch?

Question

Answer

99.9% of the time, when we talk about eating our midday meal, we say 'have lunch'.

I have lunch in the canteen. 
Do you want to have lunch together tomorrow?
I'm hungry because I haven't had lunch yet.

This is the same for all meals - breakfast, lunch, dinner, supper.

The only time when you would say 'a lunch' is when this is a formal occasion or celebration of some kind. For example, you might say:

'We're going to hold a special meal for the CEO's retirement and invite all the company's employees. We'll either have a lunch or a dinner at a nearby hotel.'

But, as you can see, this is a fairly unusual usage.

Answer

I would add to this that, for me, there is two options in this situation.

1) Let's have lunch!
OR, quite commonly:
2) Let's have some lunch!

I would never really use "a lunch" in this context. It is more to describe a formal ocassion that you will attend, for example: "I have been invited to a lunch at the club with Sarah's friends".

It refers to the ocassion, and not JUST the meal.

Tom

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