Definition of while

• 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.