What does the word subject mean?

Usage examples for subject

  1. The parts sometimes made of steel are those subject to great wear, and for which strength with a minimum of size is necessary, as piston springs, piston rods, connecting rods, cranks, crank pins, and valve rods. – Modern Machine-Shop Practice, Volumes I and II by Joshua Rose
  2. Evidently they had been talking for some time, and they were full of their subject. – Paradise Bend by William Patterson White
  3. But- but what a very funny subject for us to get on! – Poor, Dear Margaret Kirby and Other Stories by Kathleen Norris
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