What's the difference between as and while?

As


Definition:

  • (adv. & conj.) Denoting equality or likeness in kind, degree, or manner; like; similar to; in the same manner with or in which; in accordance with; in proportion to; to the extent or degree in which or to which; equally; no less than; as, ye shall be as gods, knowing good and evil; you will reap as you sow; do as you are bidden.
  • (adv. & conj.) In the idea, character, or condition of, -- limiting the view to certain attributes or relations; as, virtue considered as virtue; this actor will appear as Hamlet.
  • (adv. & conj.) While; during or at the same time that; when; as, he trembled as he spoke.
  • (adv. & conj.) Because; since; it being the case that.
  • (adv. & conj.) Expressing concession. (Often approaching though in meaning).
  • (adv. & conj.) That, introducing or expressing a result or consequence, after the correlatives so and such.
  • (adv. & conj.) As if; as though.
  • (adv. & conj.) For instance; by way of example; thus; -- used to introduce illustrative phrases, sentences, or citations.
  • (adv. & conj.) Than.
  • (adv. & conj.) Expressing a wish.
  • (n.) An ace.
  • (n.) A Roman weight, answering to the libra or pound, equal to nearly eleven ounces Troy weight. It was divided into twelve ounces.
  • (n.) A Roman copper coin, originally of a pound weight (12 oz.); but reduced, after the first Punic war, to two ounces; in the second Punic war, to one ounce; and afterwards to half an ounce.

Example Sentences:

While


Definition:

  • (n.) Space of time, or continued duration, esp. when short; a time; as, one while we thought him innocent.
  • (n.) That which requires time; labor; pains.
  • (v. t.) To cause to pass away pleasantly or without irksomeness or disgust; to spend or pass; -- usually followed by away.
  • (v. i.) To loiter.
  • (conj.) During the time that; as long as; whilst; at the same time that; as, while I write, you sleep.
  • (conj.) Hence, under which circumstances; in which case; though; whereas.
  • (prep.) Until; till.

Example Sentences: