1. earthed - Adjective
2. earthed - Verb
of Earth
Source: Webster's dictionaryFor example, in the U.S. and Canada, different color codes are used for grounded (earthed) and ungrounded systems. Source: Internet
The earthed terminal may be connected to the corresponding connection at the inverting station by means of a second conductor. Source: Internet
The outer shield, which is earthed (grounded), protects the inner shield from electromagnetic interference from outside sources. Source: Internet
Trams using trolley-pole current collection are normally powered through a single pole, with return current earthed through the steel wheels and rails. Source: Internet