Wordnet 3.0
VERB (2)
1. 
 transfer to a peripheral device, of computer data; 
2. 
 take the load off (a container or vehicle); 
- Example: "unload the truck"- Example: "offload the van"[syn: unload, unlade, offload]
WordNet (r) 3.0 (2006):
offload
    v 1: transfer to a peripheral device, of computer data
    2: take the load off (a container or vehicle); "unload the
       truck"; "offload the van" [syn: unload, unlade,
       offload]