Definition of titanium. : a silvery-gray light strong metallic element obtained from ilmenite and rutile and used especially in alloys and combined in refractory materials, pigments, and coatings â see element table.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  roster(Noun) A list of names, usually for an organization of some kind such as military officers and enlisted personnel enrolled in a particular unit; a muster roll; or a sports team, with the names of players who are eligible to be placed in the lineup for a particular game.
Normally an NBA team can have a maximum of 15 players on its roster during a season (and up to 20 during the offseason). A team normally has 12 or 13 players on its Active List, who are eligible to play in games, and can have as few as 11 for up to two weeks at a time.