Wordnet 3.0
ADVERB (1)
1. 
 during the intervening time; 
- Example: "meanwhile I will not think about the problem"- Example: "meantime he was attentive to his other interests"- Example: "in the meantime the police were notified"[syn: meanwhile, meantime, in the meantime]
WordNet (r) 3.0 (2006):
in the meantime
    adv 1: during the intervening time; "meanwhile I will not think
           about the problem"; "meantime he was attentive to his
           other interests"; "in the meantime the police were
           notified" [syn: meanwhile, meantime, in the
           meantime]