1.
If you say that someone is ~, you mean that they pay great attention to detail because they like everything to be very neat, accurate, and in good order.
...her ~ attention to historical detail...
He was ~ about his appearance.
= meticulous
ADJ
2.
If you say that someone is ~, you mean that they are concerned about keeping clean to an extent that many people consider to be excessive.
Be particularly ~ about washing your hands before touching food.
ADJ
~ly
Ernestine kept her daughters ~ly clean.
ADV