Word forms: plural Trojan horses
1. countable noun
Was Colombo the emissary of Pope Paul, his Trojan horse within the Commission?
Both factions accused each other of using the organization as a Trojan horse to advance
2. countable noun
A Trojan horse
is a computer virus
which is inserted into a program or system and is designed to take effect
after a particular period
of time or a certain number of operations.
Operating systems can be brought to a halt by a Trojan Horse.
COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers