Wiktionary
n. (law) Interference with the orderly administration of law and justice, as by giving false information to or withholding evidence from a police officer or prosecutor, or by harming or intimidating a witness or juror.
WordNet
n. impeding those who seek justice in a court (as by trying to influence or intimidate any juror or witness or officer of the court); can result in a finding of contempt of court
Wikipedia
The crime of obstruction of justice, in United States jurisdictions, refers to the crime of obstructing prosecutors or other (usually government) officials. Common law jurisdictions other than the United States tend to use the wider offense of perverting the course of justice.
Usage examples of "obstruction of justice".
Sherman Skolnick and Mark Sato of Chicago's Citizens Committee to Clean Up the Courts filed a lawsuit against Bua and Knight, charging them with obstruction of Justice.
Back when Clinton could choose Supreme Court justices, the New York Times sneered about those yahoo Republicans thinking perjury, obstruction of justice, and numerous other felonies committed by the president constituted impeachable conduct.
How about getting your ass arrested for murder, attempted murder, conspiracy to murder, obstruction of justice, and whatever else I can think of, you son of a bitch?
They want me to arrest you for abduction, and obstruction of justice, and probably ten or twelve other things.
Criminal methods - perjury, obstruction of justice, witness tampering, using the instruments of federal government to intimidate witnesses - all these have been shown to work.
Therefore, under the terms of the Amnesty Bill, there will be no further punishment for the offenses of fraud, perjury, and obstruction of justice.
I thought about the family's united front to save Ramona, how arresting her would blow my police career: charges of withholding evidence, obstruction of justice.
You are charged with leaving the scene of a crime, obstruction of justice, and attempted bribery of a police officer.