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1. An impelling or restraining force; a compulsion.
2. Joint action.
3. Ecology Any of the reciprocal actions or effects, such as symbiosis, that can occur in a community.

[Middle English coaccioun, from Latin coāctiō, coāctiōn-, a collecting, from coāctus, past participle of cōgere, to collect, condense; see coagulum. Senses 2 and 3 : co- + action.]

co·ac′tive adj.
co·ac′tive·ly adv.


(koʊˈæk tɪv)

acting together.
co•ac′tive•ly, adv.
co`ac•tiv′i•ty, n.
References in classic literature ?
In the growth of the embryo, Sir Everard Home I think noticed that the evolution was not from one central point, but coactive from three or more points.
This year's Anvil award recognizes our expertise in representing global companies that seek to build and maintain a strong presence in the United States," said Carmen Caricchio, President of CoActive Public Relations.
25 million in cash, and 332,226 shares of CoActive Marketing Group common stock, valued at $1,000,000.
In 2003, Broadband Energy Networks acquired the assets of Coactive Networks, developer and manufacturer of innovative networking software and utility gateway technology to connect electrical devices to the Internet, as well as assets from Motorola's PowerCom Utility Services Group for advanced electric metering and communications.
March 29 /PRNewswire-FirstCall/ -- CoActive Marketing Group, Inc.
Bernard, Executive Vice President, & Chief Financial Officer of Coactive Marketing Group, Inc.
NEW YORK, June 18 /PRNewswire-FirstCall/ -- CoActive Marketing Group, Inc.
NEW YORK, April 28 /PRNewswire-FirstCall/ -- CoActive Marketing Group, Inc.
OTCBB: PHLI), a nutrition technology company, announced today the appointment of Adam Mizel, Managing Principal of Aquifer Capital Group, LLC, and Marc Particelli, Chairman of the Board of Coactive Marketing Group (NASDAQ: CMKG), to its Board of Directors.
Deal of the Year (small and mid-cap) for advising, with their partner William Blair, on the sale of CoActive Technologies' DeltaTech Controls Unit to Sensata Technologies, at the M&A Atlas Awards
LLC, a private investment firm based in Greenwich, CT, announced today that it has completed the previously announced sale of CoActive Technologies' business unit DeltaTech Controls, a global leader in customized electronic operator controls based on magnetic position sensing technology for the construction, agriculture and other industries, to Sensata Technologies Holding N.