What is The in a sentence?
'The' in a sentence is an indicator that word it's referring to
is a specific person or thing: I saw the director at dinner last
night.
If it wasn't a specific director, you might say: There was a
director at dinner last night.
"The" can also be used to indicate just one: I saw the director
at dinner last night.
If there were more than one director, you might say: I saw
directors at dinner last night. I saw several directors at dinner
last night. I saw two directors at dinner last night. I saw some
directors at dinner last night.
But, just to be tricky, 'the' would also be used for more than
one if those were specific ones, such as: I saw all of the
directors at dinner last night.