To look at on all sides or in all its aspects; to view or consider with continued attention; to regard with deliberate care; to meditate on; to study, ponder, or consider.
To consider as a possibility.
To watch by craning the neck (as though it were made of rubber), especially if the observer and observed are in motion relative to each other.
Someone who engages in rubbernecking, or turning and staring.
Someone or something with a flexible neck.