Pants vs. Underpants: What's the Difference?

Pants and Underpants Definitions
Pants
To breathe rapidly in short gasps, as after exertion.
Underpants
Underwear covering the genitalia and often buttocks, usually going no higher than the navel.
Pants
To beat loudly or heavily; throb or pulsate.
Underpants
An undergarment that covers the body from the waist no further than to the thighs; usually worn next to the skin
Pants
To give off loud puffs, especially while moving.
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Pants
To long demonstratively; yearn
Was panting for a chance to play.
Pants
To utter hurriedly or breathlessly
I panted my congratulations to the winner of the race.
Pants
A short labored breath; a gasp.
Pants
A throb; a pulsation.
Pants
A short loud puff, as of steam from an engine.
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Pants
An outer garment that covers the body below the waist, usually to the ankles, and is divided into sections to fit each leg separately
She decided to wear pants instead of a skirt. He bought a new pair of pants.
Pants
Underpants.
Pants
An outer garment that covers the body from the waist downwards, covering each leg separately, usually as far as the ankles; trousers.
Pants
An undergarment that covers the genitals and often the buttocks and the neighbouring parts of the body; underpants.
Pants
Rubbish; something worthless.
You're talking pants!
The film was a load [or pile] of pants.
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Pants
Of inferior quality, rubbish.
Your mobile is pants — why don’t you get one like mine?
Pants
A garment extending from the waist to the knee or ankle, covering each leg separately.
Pants
Underpants.
Pants
Underpants worn by women; panties.
Pants
(usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately;
He had a sharp crease in his trousers
Pants
(usually in the plural) underpants worn by women;
She was afraid that her bloomers might have been showing