Can this count as a cocktail dress?

http://www.ebay.com/itm/SEXY-OFF-SHOULDER-KIMONO-SLEEVES-SWEATER-DRESS-S-M-L-XL-/160535273767?pt=US_CSA_WC_Dresses&var=&hash=item2560a5e127

There is an event (award ceremony) that I must attend tomorrow and all it says in the description is “cocktail dress”. No one is going to be wearing evening gowns or anything, but I have this dress and I was wondering if it would be good enough if I just added some really fancy jewelry. Please note, in real life it isn’t quite that short. Is this appropriate? I feel like my other dresses that technically count as “cocktail” dresses are a little bit too sexy/revealing for this event. This one is actually grandma approved lol