Source : Webster's Revised Unabridged Dictionary (1913)

Relinquishment \Re*lin"quish*ment\ (-ment), n.
   The act of relinquishing.

Source : WordNet®

relinquishment
     n 1: a verbal act of renouncing a claim or right or position etc.
          [syn: {relinquishing}]
     2: the act of giving up and abandoning a struggle or task etc.
        [syn: {relinquishing}]