a complete construction headed by an adjective. APs typically modify nouns and occur as complements to verbs such as be, seem, become. For example: The man guilty of this heinous crime was imprisoned. John seems rather stupid.
A phrase headed by an adjective (e.g. proud, good, happy). The Head may be premodified ( very good). Certain Heads may be postmodified ( proud of you), or can be pre- and postmodified ( very proud of you). See also