Here in New Zealand breakfast and lunch are the same as the UK. In between those two meals, there is morning tea, the equivalent of elevenses but not the same as second breakfast. There is also afternoon tea – a mid-afternoon break with a snack and drink which might be tea or coffee for adults and juice, milk or water for children. What I would call supper – a family meal in the evening – is invariably called tea but does not usually include tea for drinking. A more formal evening meal with guests or at a restaurant is called dinner.
The other break in the working day is known as the smoko – an opportunity for a cigarette or, I suppose, a pipe. This is dying out as increasing numbers of people don't smoke these days. Nevertheless, the term smoko is still used for a chance to sit down and relax for 10 minutes.