pin down

: a piece of solid material (such as wood or metal) used especially for fastening things together or as a support by which one thing may be suspended from another

: the center peg of a target

: something that resembles a pin especially in slender elongated form

: to fasten, join, or secure with a pin

: to hold fast or immobile

: to present (a young woman) with a fraternity pin as a pledge of affection

: of or relating to a pin

: having a grain suggesting the heads of pins

: toward or in a lower physical position

: to a lying or sitting position

: toward or to the ground, floor, or bottom

: down (see ¹down) along, around, through, toward, in, into, or on

: to cause to go or come down (see ¹down) : such as

: to cause to fall by or as if by shooting : bring down

: consume

: occupying a low position

: directed or going downward

: lower in price

: descent, depression

: an instance of putting down someone (such as an opponent in wrestling)

: a complete play to advance the ball

: an undulating usually treeless upland with sparse soil

: a sheep of any breed originating in the downs of southern England

: a covering of soft fluffy feathers

: something soft and fluffy like down

: down syndrome