1.
If someone is ~, they are wearing special clothes, in order to look smarter than usual or in order to disguise themselves.
You’re all ~. Are you going somewhere?...
ADJ: usu v-link ADJ
2.
If you say that something is ~ as something else, you mean that someone has tried to make it more acceptable or attractive by making it seem like that other thing.
He tried to organise things so that the trip would be ~ as a UN mission.
ADJ: v-link ADJ as/in n disapproval
3.
~ to the nines: see nine