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.
In the national football league what does practice squad deletion mean? In the NFL, the teams are allowed to have 53 players on their roster. Of these 53 players, 45 are allowed to dress for a game. The players on the roster that don't dress for aâ¦ game are considered to be on the 'practice squad'.