Englishfor English speakers
ultimate
Adjective
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The ultimate goal, success, decision, etc. is the final one.
You can't have ultimate success without a lot of little successes.
The moon is good, but there's no question that Mars is the ultimate goal.
Presidents have the ultimate responsibility to keep us safe.
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The ultimate test, responsibility, power, etc. is the one that is more important, bigger, stronger, etc. than the others.
They are trying to build the ultimate computer, one that can do anything and everything.
If you could save someone's life, I think that's the ultimate goal.
velocity
Noun
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Something's velocity is how fast it is moving.
The bullet comes out of a gun at a high velocity.
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In science, velocity is how fast something is moving in a particular direction.
The velocity of the car was 10 metres per second to the north-east when it hit the tree.