It is lunch time.
“Mummy, What does ‘new’ mean?”
“That something was made or born a short time ago.”
“What does ‘old’ mean?”
“It means that something was made or born a long time ago.”
“What does ‘red’ mean?”
Briefly I consider going into light spectrum and so on, but I decide against it. “It means something has the colour red.”
“What does ‘one’ mean?”
“That there is only one of something.”
“What do two, three, four, five and all the other numbers mean?”
Now I’ve had enough.
“They are arbitrarily assigned combinations of phonemes used to signify the number of units of something present at any one time.”
Well, he was asking for it.