Martell Webster (born December 4, 1986 in Edmonds, Washington) is an American professional basketball player currently a member of the Minnesota Timberwolves of the NBA. The 6' 7" (2.01 m), 235 lbs (107 kg) small forward–shooting guard was nicknamed "The Definition" as a play on his surname (popularized by Webster's Dictionary), given to him by a personal friend. Webster is the cousin of Jason Terry of the Dallas Mavericks.
Webster was selected by the Blazers with the sixth pick in the 2005 NBA Draft after the Blazers' traded down their third pick to the Utah Jazz just hours before the draft. He was assigned to the Fort Worth Flyers of the NBA Development League by the Blazers in January 2006, and in doing so became highest drafted player (6th overall) to be assigned to the D-League until Hasheem Thabeet. He later returned to the Portland Trail Blazers in February 2006. He scored a season-high 26 points in a January 5, 2008 win over the Utah Jazz, with 24 of them scored in the third quarter. He is one of the last ever high school lottery picks to be chosen in an NBA Draft due to new draft eligibility rules introduced in 2006. In October 2008, Webster signed a four-year, $20 million contract extension.
On February 20, 2009, it was announced by Trail Blazers athletic trainer Jay Jensen that Webster would likely miss the rest of the 2008–09 NBA season with a left foot injury, having only played 5 minutes during the season.