Source : Webster's Revised Unabridged Dictionary (1913)

Presidency \Pres"i*den*cy\, n.; pl. {Presidencies}. [Cf. F.
   pr['e]sidence.]
   1. The function or condition of one who presides;
      superintendence; control and care.

   2. The office of president; as, Washington was elected to the
      presidency.

   3. The term during which a president holds his office; as,
      during the presidency of Madison.

   4. One of the three great divisions of British India, the
      Bengal, Madras, and Bombay Presidencies, each of which had
      a council of which its governor was president.

Source : WordNet®

presidency
     n 1: the tenure of a president; "things were quiet during the
          Eisenhower administration" [syn: {presidential term}, {administration}]
     2: the office and function of president; "Andrew Jackson
        expanded the power of the presidency beyond what was
        customary before his time" [syn: {presidentship}]