While vs. Since

While vs. Since — Is There a Difference?
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Difference Between While and Since

Whilenoun

An uncertain duration of time, a period of time.

He lectured for quite a long while.

Sinceadverb

From a specified time in the past.

I met him last year, but haven't seen him since.

Whileconjunction

During the same time that.

He was sleeping while I was singing.

Sincepreposition

From: referring to a period of time ending in the present and defining it by the point in time at which it started, or the period in which its starting point occurred.

Whileconjunction

Although.

This case, while interesting, is a bit frustrating.

Sincepreposition

Continuously during that period of time.

I have known her since last year.
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Whileconjunction

Until.

I'll wait while you've finished painting.

Sincepreposition

At certain points during that period of time.

Whileconjunction

As long as.

While you're at school you may live at home.

Whilepreposition

Until.

Whileverb

(transitive) To pass (time) idly.

Whileverb

To loiter.

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Whilenoun

a period of indeterminate length (usually short) marked by some action or condition;

he was here for a little whileI need to rest for a piecea spell of good weathera patch of bad weather