Definition
Having no value, effect, or significance; amounting to nothing or invalid.
Example
The contract was declared null after the court's decision.
Conversation

Did you see the results of the test we took?

Yeah, they were pretty disappointing for me.

Mine were almost null; I didn't study at all.

Same here! I guess we both need to hit the books harder next time.
Synonyms & Antonyms
Antonyms
valid
significant
meaningful
Definition
A term used to describe a value of zero or nothing, often in contexts like mathematics or computing.
Example
In programming, a variable that has not been assigned a value is often referred to as null.
Conversation

I tried to tune into that radio station, but it was completely null.

Really? That's strange, I could hear it just fine yesterday.

Maybe the signal was null because of the weather or something.
Definition
To make something invalid or void; to cancel or negate it.
Example
The new law will null the previous regulations.
Tense Forms
Past: nullified
Past Participle: nullified
Conversation

I heard they decided to null the contract with that supplier.

Really? I didn't think they would do that.

Yeah, it seems like they found a better option.
Root Explanation
Null → It originates from Latin 'nullus' (meaning not any or no). The word 'null' signifies the absence of anything or a value of zero.
Memory Tip
Think of 'not any' in Latin — that's why 'null' means the absence of anything.
Visually Confused Words
ull
nul
unhull
ungull
unfull
undull