A commercial jet capable of exceeding the speed of sound.
- ‘The M1 tank, not the supersonic transport, is the symbol of the age.’
- ‘However, many believe that the environmental objections to supersonic transport mean it will never be a commercially viable form of passenger transport.’
- ‘He worked on swing wing jets and supersonic transport, nuclear submarines, radio telescopes and lightweight calipers for disabled people.’
We take a look at several popular, though confusing, punctuation marks.