lock-on


Also found in: Dictionary, Wikipedia.

lock-on

[′läk ¦ȯn]
(electronics)
The procedure wherein a target-seeking system (such as some types of radars) is continuously and automatically following a target in one or more coordinates (for example, range, bearing, elevation).
The instant at which radar begins to track a target automatically.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.