Language is defined by how it is used. The fact that this is how people use these words, makes it the definition. Lots of people in the real world know exactl

Language is defined by how it is used. The fact that this is how people use these words, makes it the definition. Lots of people in the real world know exactly what it means when people say "big 5 tech companies". You'd have to be extremely obtuse to not know what people mean when they say those words.