unknown number
The term "unknown number" can refer to a hidden or unfamiliar phone number in telecommunications or an unspecified value in mathematics.
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Definition
B2Telecommunications
(common)A phone number that is not recognized or is hidden from the recipient.
Example
- I received a call from an unknown number and didn't answer.
- The screen displayed 'unknown number' when the phone rang.
B2Mathematics
(academic, technical)A value in an equation that needs to be determined.
Example
- In the equation x + 5 = 10, x is the unknown number.
- Solving for the unknown number requires isolating the variable.
Similar
Terms that have similar or relatively close meanings to "unknown number":
unknown quantitywrong numberrandom numberhidden quantitymagic numbertelephone numberhouse numbercontact numbertake a number