資料來源 : Webster's Revised Unabridged Dictionary (1913)

Infinity \In*fin"i*ty\, n.; pl. {Infinities}. [L. infinitas;
   pref. in- not + finis boundary, limit, end: cf. F.
   infinit['e]. See {Finite}.]
   1. Unlimited extent of time, space, or quantity; eternity;
      boundlessness; immensity. --Sir T. More.

            There can not be more infinities than one; for one
            of them would limit the other.        --Sir W.
                                                  Raleigh.