ringfence
noun
Definitions
A fence which encircles a large area, or a whole estate, within one enclosure.
verb
Definitions
To guarantee the safety of funds or investment. In particular, to ensure some degree of distinction for monies, that may provide immunity against untoward financial claims.
To specify that funds may only be used for a specific purpose, especially government funds.
To require workers to remain in (particular types of work), as during wartime.