a seal of approval

seal of approval

An indication of one's endorsement or authorization of something. Despite the wording, the phrase does not typically refer to a physical seal. No, you can't start that construction project until the boss gives it his seal of approval.
See also: approval, of, seal

a ˌseal of apˈproval

the formal support or approval of a person or an organization: Our project has the director’s seal of approval.
See also: approval, of, seal