Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class I. Words Expressing Abstract Relations
Section V. Number
3. Indeterminate Number

105. Infinity.

   NOUN:INFINITY, infinitude, infiniteness &c. adj.; perpetuity [See Perpetuity]; inexhaustibility, immensity, boundlessness.
   VERB:BE INFINITE &c. adj.; know no limits, know no bounds, have no limits, have no bounds; go on forever.
   ADJECTIVE:INFINITE; immense; numberless, countless, sumless, measureless, innumerable, immeasurable, incalculable, illimitable, interminable, unfathomable, unapproachable; exhaustless, indefinite; without number, without measure, without limit, without end; incomprehensible; limitless, endless, boundless, termless; untold, unnumbered, unmeasured, unbounded, unlimited, illimited; perpetual [See Perpetuity].
   ADVERB:INFINITELY &c. adj.; ad infinitum [L.].
  1. As boundless as the sea.—Romeo and Juliet
  2. A dark Illimitable ocean, without bound, Without dimension, where length, breadth, and height, And time, and place are lost.—Milton