gesture, action, or sound that is used to convey information or instructions. Road-side lights that direct traffic to go or stop. To send a message using your hands or other means.

used to single out one person or thing over all others.

not same as another or each other.

Evidence that helps prove something is true. To give assistance or advice to someone.

with great power or strength.

Force that stops or slows movement of something.

Having or involving more than one of something. number exactly divisible by another number.

When one thing is replaced by another.

Fact of increasing; amount something grows by. To make or become larger in size or amount.

currently popular or widely discussed on social media websites. A move from a typical or regular direction. To be current and popular.

of no value. not at all. Number or value of zero. not anything.

Existing or happening before the present time.

act of withdrawing troops.

Typical or normal; usual; ordinary. Total of numbers divided by the number of items. amount to or achieve as average rate or amount over period of time.

To remove unwanted substances from a liquid or gas.