It can also refer to food like lunch or dinner which the danish school system did not prepare me for in their english lessons, https://en.wikipedia.org/wiki/Tea_(meal)#Tea_as_the_evening_...
That Wikipedia section needs a rewrite. It does mention that that usage is a class marker but then conflates it with the pastry-and-tea afternoon snack practice of upper classes. They are two radically disjoint uses. The origin of the “tea” being the term for evening meal are pretty well attested to lie the poverty of the English lower classes who could not afford much more than a cup of tea in the evening. I grew up…
BTW, Cantonese is actually a "chai language": the character 茶 (tea) reads like "char" as in charcoal, without the h sound and in a low tone.