NOUN (1)

1. someone affected by aphasia or inability to use or understand language;


ADJECTIVE (2)

1. related to or affected by aphasia;
- Example: "aphasic speech"

2. unable to speak because of a brain lesion;

The Collaborative International Dictionary of English v.0.48:

Aphasic \A*pha"sic\, a.
   Pertaining to, or affected by, aphasia; speechless.
   [1913 Webster]

WordNet (r) 3.0 (2006):

aphasic
    adj 1: related to or affected by aphasia; "aphasic speech"
    2: unable to speak because of a brain lesion
    n 1: someone affected by aphasia or inability to use or
         understand language