Quiet a. : In a state of rest or calm; without stir, motion, or agitation; still; as, a quiet sea; quiet air.

Quiet a. : Free from noise or disturbance; hushed; still.

Quiet a. : Not excited or anxious; calm; peaceful; placid; settled; as, a quiet life; a quiet conscience.

Quiet a. : Not giving offense; not exciting disorder or trouble; not turbulent; gentle; mild; meek; contented.

Quiet a. : Not showy; not such as to attract attention; undemonstrative; as, a quiet dress; quiet colors; a quiet movement.

Quiet a. : The quality or state of being quiet, or in repose; as an hour or a time of quiet.

Quiet a. : Freedom from disturbance, noise, or alarm; stillness; tranquillity; peace; security.

Quiet v. t. : To stop motion in; to still; to reduce to a state of rest, or of silence.

Quiet v. t. : To calm; to appease; to pacify; to lull; to allay; to tranquillize; as, to quiet the passions; to quiet clamors or disorders; to quiet pain or grief.

Quiet v. i. : To become still, silent, or calm; -- often with down; as, be soon quieted down.

Example:
What personality is better: Quiet/reserved, or being a person who talks alot/ and is always happy?

Taxonomy
B-Quiet, products, Dynamat, sound deadening material, sound deadening, dynamat extreme, barrier, line of products, exhaust noise, quiet computer, absorber, Lcomp, commonly used, computer noise, deaden, dynamat xtreme, Dampers, noises.

Defination from the web:
Offers a full line of sound deadening products.