Looking up...
to hold something tightly with one's hand
He grasped the railing to steady himself.
He held the railing tightly to keep his balance.
Often used to describe holding something firmly or securely.
to understand or comprehend something
I'm still trying to grasp the new software.
I'm still trying to understand how the new software works.
Can be used metaphorically to describe understanding an idea or concept.
Remember that 'grasp' can mean both holding something physically and understanding something mentally. Context will help you determine which meaning is intended.
'Grasp' is often followed by prepositions like 'of', 'on', or 'at' when used metaphorically, as in 'grasp of the situation'.
From Middle English 'graspen', from Old English 'græspian', meaning to seize or take hold of.
The word 'grasp' can be used both literally (to hold something) and metaphorically (to understand something). In the metaphorical sense, it often implies a firm or complete understanding.