If you think of it from practical side, it's

Voltage source = stabilized(fixed) voltage. That is what we usually expect to see as a power source.

Current source = stabilized(fixed) current. This kind of source will increase/decrease it's output voltage to match required current. This is used to power non-linear devices like LEDs, lasers, gas discharge tubes.

If you think of it from practical side, it's

Voltage source = stabilized  (fixed) voltage. That is what we usually expect to see as a power source.

Current source = stabilized  (fixed) current. This kind of source will increase/decrease its output voltage to match required current. This is used to power non-linear devices like LEDs, lasers, gas discharge tubes.