(law) A fee paid to counsel for work on a particular case.

(law) A fee paid to secure a priority of claim on a counsel's services.

(accounting) The amount of net income left over for a business after it has paid out dividends to its shareholders.

(rail transport, mechanical engineering) A device that retains some air pressure in a train's air brake cylinders even when the automatic brake valve is set to the fully-released position, used on steep downgrades to allow a degree of continuous braking effort to be maintained without depleting the pressure in the train's brakepipe (which would result in the loss of nearly all braking ability, causing a runaway).

plural of retaining valve

The policy of preserving historical material regarded as problematic (such as statues), with appropriate contextual explanation, rather than destroying it or attempting to erase it from history.

The practice of charging a retainer fee, or a client relationship based on such a fee.

plural of retainership