D defs.my
Entry 5 senses Webster, 1913

Endless

/ĕn'-dləs/ · End·less · IPA /ˈɛndlɪs/
01 a. Without end; having no end or conclusion; perpetual; interminable; -- applied to length, and to duration; as, an endless line; endless time…
  1. 1.
    Without end; having no end or conclusion; perpetual; interminable; -- applied to length, and to duration; as, an endless line; endless time; endless bliss; endless praise; endless clamor.
  2. 2.
    Infinite; excessive; unlimited.
  3. 3.
    Without profitable end; fruitless; unsatisfying.[R.]
  4. 4.
    Void of design; objectless; as, an endless pursuit.
  5. 5.
    having a linear or ribbonlike form with the two ends connected together, such as in a circle, ellipse, torus, or any other closed loop. Belts or chains used in drive mechanisms are considered endless in this sense. See endless chain.
Phrases & compounds
Endless chain — a chain which is made continuous by uniting its two ends.
Endless screw — See under Screw.