Definition of Semtex in English:



mass noun
  • A very pliable, odourless plastic explosive.

    • ‘Three minutes later, the screener noticed that the explosive trace detection machine indicated a positive alert for Semtex, a plastic explosive, from the laptop.’
    • ‘Imagine that a private company had developed an explosive ten times more powerful than Semtex.’
    • ‘Three minutes later, a machine that detects trace explosives showed a positive reading for Semtex, a volatile plastic explosive.’
    • ‘Ms Murphy is still haunted by the memory of how Hindawi tried to send her to her death by packing her hand luggage with Semtex plastic explosives.’
    • ‘The grenade launcher, for instance, transformed the striking power of small fighting groups; plastic explosives like Semtex were a similar boon.’


1980s: probably a blend of Semtin (the name of a village in the Czech Republic near the place of production) and explosive.