Definition from Wiktionary, the free dictionary
From Latin decoratus, past participle of decorare (“to adorn, distinguish, honor”), from decus (“ornament, grace, dignity, honor”), akin to decor (“elegance, grace, beauty, ornament”), from decet (“adorn, befit”).
- (transitive) To furnish with decorations.
- (transitive) To improve the appearance of an interior of a house, room, office and so forth.
- (computing) (transitive) (In some programming languages) To extend a method, etc. by attaching some further code item.
- It makes sure that the field name argument is not empty, and that the field specified there is an actual existing field in the class which declares the method decorated with this attribute.
Derived terms 
Related terms 
to furnish with decorations
to improve the appearance of a house, room, office and so forth
- second-person plural present active imperative of decorō