There is no generally-accepted general definition of "evidence."

Weil v. Seltzer, 873 F.2d 1453, 1460 (D.C. Cir. 1989) (vacating judgment in survival and wrongful death action in which the trial court allowed the testimony of physician's former patients as evidence of habit, on ground that such evidence was admitted for improper purpose of showing that the physician...If a pattern of behavior of a natural person does not rise to the status of a habit, it may constitute a character trait and such non-habitual behavior may be barred by the prohibition against circumstantial character evidence.

Michelson v. United States, 335 U.S. 469, 475-476 (1948) ("Courts that follow the common law tradition almost unanimously have come to disallow resort by the prosecution to any kind of evidence of a defendant's evil character to establish a probability of guilt. Not that the law invests the defendant with...A person's character, or propensity, is inadmissible to show that person's conduct on a specific occasion.

Cf. Brazos River Authority v. GE Ionics, Inc., 469 F.3d 416, 426 (5th Cir. 2006) (upholding trial court's exclusion of evidence of similar fires at other facilities because "the propensities of a particular person to act a certain way are not at issue in this case, which involves the properties and...The prohibition against circumstantial use of character -- the use of character, propensity, or disposition to show conduct on a particular occasion -- is inapplicable in trials of civil actions.