Tea to me is two different things.
when I was little I remember mum bringing me home from school and having 'tea' before we had dinner when dad got home from work.
Tea then was teacakes (sort of bread rolls with rasins and stuff, toasted in front of our real fire) and hot chocolate or tea to drink.
Tea now, for me is our evening meal, I still sometimes call it dinner and the kids tell me I'm trying to be posh when I do!