This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Complete cessation of activity or progress: Work came to a standstill.

n. complete immobility; halt

n. A standing without moving forward or backward; a stop; a state of rest.

n. A halt; a pause; a stop, especially in consequence of obstruction, exhaustion, or perplexity.

Deficient in progress or advancement; unprogressive: as, a standstill policy.

n. The state of standing still; a state of immobility.

v. remain in place; hold still; remain fixed or immobile

n. a situation in which no progress can be made or no advancement is possible

n. an interruption of normal activity

"Investors have speculated about a potential deal since September when the company signed a short-term standstill agreement with Elliott Associates LP, which forfeited its right to further build its stake in order to enter nonpublic talks with the company."

run    movement    motion   

situation    stop    halt   

to gallop to a standstill   

bog down    freeze    grind to a halt    mire    stop dead    get stuck   

standstill agreement   

stop    stand    station    deadlock    stay    idle    grind    impasse    halt   

obliteration    about-face    stoppage    free-school    somersault    blackout    disconnection    unconsciousness    discontinuation