High tea (also known as meat tea or tea time in Ireland) usually refers to the evening meal or dinner of the working class, typically eaten between 5 pm and 7 pm.
High tea typically consists of a hot dish, followed by cakes and bread, butter and jam. Occasionally there would be cold cuts of meat, such as ham salad. The term was first used around 1825, and high is used in the sense of well-advanced (like high noon, for example) to signify that it was taken later in the day than afternoon tea; it was used predominantly by the working class and in certain British dialects of the north of England and Scotland.
In Australia any short break for tea in the afternoon is referred to as “afternoon” tea. As a result, the term “High tea” is used to describe the more formal affair that the English would call “Afternoon tea”.