A bill to amend title 18, United States Code, to make certain changes with respect to bringing a civil action for the misappropriation of a trade secret, and for other purposes.

Deterring Espionage by Foreign Entities through National Defense Act of 2018 or the DEFEND Act This bill makes changes to provisions governing federal civil claims for trade secret misappropriation. Specifically, it does the following: increases punitive damages for a victim, extends the statute of limitations for filing a claim, and allows claims for conduct that occurs outside the United States if the offense causes substantial economic harm in the United States.