
A extra=lit. system, series, grouping of enterprises, order of succession is a set of companies with interlocking business relationships and shareholdings. It is a type of informal business group. The keiretsu maintained dominance over the Japanese economy for the last half of the 20th century. The member companies own small portions of the shares...
Found on
http://en.wikipedia.org/wiki/Keiretsu

A group, or network, of manufacturing and other companies in Japan, usually centered around a bank and including a trading company. Keiretsus are characterized by cross-ownership of shares, strategic coordination, and preference for transactions within the network.
Found on
http://www-personal.umich.edu/~alandear/glossary/k.html

(from the article `Japan`) Japanese industry is increasingly characterized by a tendency toward tie-ups, mergers, and takeovers among the larger manufacturing and industrial ...
Found on
http://www.britannica.com/eb/a-z/k/19

A network of Japanese companies organized around a major bank. The term is also used outside of Japan to describe how a large corporation with many subsidiaries and associated firms can manipulate revenues. For example, firm A and B are controlled by firm C. Firm A is forced to buy its input from firm B at a high price. As a result, A is unprofitab...
Found on
http://www.duke.edu/~charvey/Classes/wpg/bfglosk.htm

A network of Japanese companies organized around a major bank.
Found on
http://www.encyclo.co.uk/local/22402

In Japan, an alliance of companies or organisations which own shares in one another as a means of security, but each individual company operates independently
Found on
http://www.encyclo.co.uk/local/22643

(esp. in Japan) a loose coalition of business groups.
Found on
https://www.infoplease.com/dictionary/keiretsu
No exact match found.