Wordnet 3.0
ADVERB (1)
1. 
 using the voice; 
 not silently; 
- Example: "please read the passage aloud"- Example: "he laughed out loud"[syn: aloud, out loud]
WordNet (r) 3.0 (2006):
out loud
    adv 1: using the voice; not silently; "please read the passage
           aloud"; "he laughed out loud" [syn: aloud, out loud]