sit tight
To wait patiently; to take no action; to remain quiet or relatively motionless.
I'll be back in a few minutes, so sit tight while I go find her.
adj
Firmly held together; compact; not loose or open.
a tight sponge; a tight knot
Pull your seatbelts tight before takeoff.
Firmly held together; compact; not loose or open.
tight control on a situation
Firmly held together; compact; not loose or open.
Make sure to pull the rope tight.
The face which emerged was not reassuring. It was blunt and grey, the nose springing thick and flat from high on the frontal bone of the forehead, whilst his eyes were narrow slits of dark in a tight bandage of tissue. […].
Firmly held together; compact; not loose or open.
I grew up in a poor neighborhood; money was very tight, but we made do.
China’s currency, the jenminpi, has remained stable; the Chinese assert that it is the "world’s most stable currency." This is generally conceded to be the result of the care with which the Chinese economy and its tight budget are managed.
Firmly held together; compact; not loose or open.
We've grown tighter over the years.
The drawbacks of being in a too-tight couple (there's no room to blow your nose)
adv
Firmly, so as not to come loose easily.
Hold on tight to the rope.
'I had my eyes tight shut.'
Soundly.
Good night, sleep tight.
verb
To make tight; tighten.
To make water-tight.