Definition of "VT"

Abbreviation of Vermont, a state of the United States of America.  examples

Initialism of ventricular tachycardia.  examples

Initialism of videotape.  examples

(dated) Initialism of video terminal (device that connected to a computer server remotely, which had little computing power of its own; has been uncommon since the mid 1990s).  examples

Initialism of vacuum tube (device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied).  examples

(military, historical, of an artillery fuze) Initialism of variable-time (WWII cover designation for the proximity fuse).