The phrase "relative lack" means that there is a shortage or insufficiency of something when compared to a certain standard or reference point. Full definition
Third - row seat isn't split, relative lack of cargo capacity behind the third row, stability control only available on the top trim level, options can get pricey. (edmunds.com)
There's been some disappointment over the film's relative lack of action, as if that's a bad thing. (popdose.com)
«Sideways,» which screens tomorrow at 7:30 p.m., features sterling performances by Paul Giamatti, Thomas Haden Church, Virginia Mayo, and Sandra Oh, as an obsession (or relative lack thereof) with wine defines relationships between friends and potential romantic partners. (dallasfilmnow.com)