Question

Jackie says "milk," meaning "i want some milk." when his mother pours it, he says "milk," meaning "this is milk." after taking a sip, he pushes his cup toward his mother and says "milk," meaning "do you want my milk?" in each case, "milk" is an example of

Answer 1

It would be an example of a holophrase
Holophrasing happens when we give a certain word without proper grammar, but still held a similar intent with the full sentence/phrase.
Another example would be when a boss scream 'Coffee!' to the interns so they would bring one to his/her office without having to say 'Please bring me a cup of coffee'