What does "lookahead" refer to?
&quot;A good driver drives in three cars. His own car, the car behind him, and the car in front of him&quot;. (Bertold Brecht).
&quot;Lookahead&quot; is what you do when you drive a car. You look ahead and make decisions not just based on things around you, but also based on things ahead of you.
A parser with a lookahead of 1 makes decisions based on the current symbol and the symbol ahead of it. That often keeps it from making the wrong parsing decisions.