Adjective phrase - Wikipedia
https://en.wikipedia.org/wiki/Adjective_phraseAn adjective phrase (or adjectival phrase) is a phrase the head of which is an adjective, almost any grammar or syntax textbook or dictionary of linguistics terminology defines the adjective phrase in a similar way, e.g. Kesner Bland (1996:499), Crystal (1996:9), Greenbaum (1996:288ff.), Haegeman and Guéron (1999:70f.), Brinton (2000:172f.), Jurafsky and Martin (2000:362).</ref> The adjective can initiate the phrase (e.g. fond of steak), conclude the phrase (e.g. very happy), …