To reposition something such as a product or service means to try to interest more or different people in it, for example by changing certain things about it or the way it is marketed.
例句
The sell-off is aimed at repositioning the company as a publisher principally of business information...出售公司部分業務的目的是將公司重新定位為以商業信息類出版物為主的出版商。Mazda needs to reposition itself if it is to boost its sales and reputation.要想提升銷量和聲譽，馬自達公司需要對自己重新定位。