What's the difference between by and while?

By


Definition:

  • (pref.) In the neighborhood of; near or next to; not far from; close to; along with; as, come and sit by me.
  • (pref.) On; along; in traversing. Compare 5.
  • (pref.) Near to, while passing; hence, from one to the other side of; past; as, to go by a church.
  • (pref.) Used in specifying adjacent dimensions; as, a cabin twenty feet by forty.
  • (pref.) Against.
  • (pref.) With, as means, way, process, etc.; through means of; with aid of; through; through the act or agency of; as, a city is destroyed by fire; profit is made by commerce; to take by force.
  • (adv.) Near; in the neighborhood; present; as, there was no person by at the time.
  • (adv.) Passing near; going past; past; beyond; as, the procession has gone by; a bird flew by.
  • (adv.) Aside; as, to lay by; to put by.
  • (a.) Out of the common path; aside; -- used in composition, giving the meaning of something aside, secondary, or incidental, or collateral matter, a thing private or avoiding notice; as, by-line, by-place, by-play, by-street. It was formerly more freely used in composition than it is now; as, by-business, by-concernment, by-design, by-interest, etc.

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: