Dic: mark

9. N-COUNT : N of n/-ing

The mark of something is the characteristic feature that enables you to recognize it.

• The mark of a civilized society is that it looks after its weakest members.  
• =  sign   

10. N-SING : a N of n

If you say that a type of behaviour or an event is a mark of a particular quality, feeling, or situation, you mean it shows that that quality, feeling, or situation exists.

• It was a mark of his unfamiliarity with Hollywood that he didn't understand that an agent was paid out of his client's share. 
• =  indication, sign   

...Cobuild

7(a). A distinctive trait or property: Good manners are the mark of a civilized person.

7(b). A lasting effect: The experience had left its mark.

7(c). Mark. A particular mode, brand, size, or quality of a product, especially a weapon or machine.

8. A recognized standard of quality: schoolwork that is not up to the mark.

9(a). Importance; prominence: "a fellow of no mark nor likelihood" Shakespeare.

9(b). Notice; attention: a matter unworthy of mark.

...Am-Heritage