1SLA [uncountable and countable] the seventh letter of the English alphabet
2 [uncountable and countable] the fifth note in the musical scale of C major or the musical key based on this note
3 [singular,uncountable] American English used to describe a film that has been officially approved as suitable for people of any age [↪ PG; = U BrE]
4 [countable] technical a unit for measuring the force caused by gravity on an object as it starts to move faster and faster :
Astronauts endure a force of several G's during take-off.
Astronauts endure a force of several G's during take-off.5 [uncountable] American English a grand (=$1000)

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