a packet of promotional materials, as background information, photographs, or samples, for distribution to the press, as at a press conference.
Origin of press kit
First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for press kit
a set of documents, usually containing useful facts and figures, given to journalists by a company prior to a product release, news conference, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012