Has a NBA team ever went undefeated?

No, no NBA team has ever gone undefeated. This means that no team has won every single game in a single season. The closest any team came to achieving a perfect season was the 1971-1972 Los Angeles Lakers, who won 33 consecutive games but eventually lost a couple of games during the regular season. Another notable example is the 2015-2016 Golden State Warriors, who set a regular-season record by winning 73 games but also lost nine games that season. So, while teams have had remarkable winning streaks and impressive records, none have been able to go undefeated throughout an entire NBA season.