bandwidth

1. (of a signal) The width of the smallest frequency band within which the signal can fit.countableuncountable

2. (networking, informal) The rate of data flow in digital networks typically measured in bits per second; the bitrate.Examples: "While comm buoys allow rapid transmission, there is a finite amount of bandwidth available. Given that trillions of people may be trying to pass a message through a given buoy at any one time, access to the network is parceled out on priority tiers."countableinformaluncountable

3. (informal) The capacity, energy or time required.Examples: "I think it's a worthy project, but I just don't have the bandwidth right now."; "Yet... rather than exploiting opportunities to their fullest, Perry uses with conviction the word "frustrated" to describe a typical approach to government with ideas: "You'll get the response 'we don't have the bandwidth to deal with that'.""; "Kiriyenko's personal bandwidth to do so is likely limited, however, as he also oversees many of the Kremlin's internal machinations, including the veteran-focused "Time of Heroes" program."countableinformaluncountable

4. (graph theory) The minimum, over all orderings of vertices of a given graph, of the length of the longest edge.countableuncountable