One who, or that which, grabs or seizes.
A machine in an amusement arcade containing prizes which the player must attempt to pick up with a mechanical grabbing arm.
A line of dialogue, etc. that captures the viewer's attention.
An assumption taken to be true for the purpose of argument or investigation.
Used loosely, a tentative conjecture explaining an observation, phenomenon or scientific problem that can be tested by further observation, investigation and/or experimentation. As a scientific term of art, see the attached quotation. Compare to theory, and quotation given there.
The antecedent of a conditional statement.