What is the meaning of the word "stamp"?

Definitions:

a symbol that is the result of printing or engraving noun
- The wedding invitations had a decorative stamp on the envelope.
a type or class noun
- More of my stamp are needed to get the job done right.
affix a stamp to verb
- Are the letters properly stamped?
crush or grind with a heavy instrument verb
- stamp fruit extract the juice
form or cut out with a mold, form, or die verb
- stamp needles
reveal clearly as having a certain character verb
- My playing stamps me as a Romantic.
to mark, or produce an imprint in or on something verb
- My name is permanently stamped on maps of my hometown.