Definitions

1. noun

standard, a level or amount considered normal or acceptable

“The company adhered to the std set by the industry.”

2. noun

standard deviation, a measure of the amount of variation or dispersion of a set of values

“The std of the test scores was higher than expected.”

3. abbreviation

abbreviation for standard, or for the Standard Template Library (in computing)

“The software used the std library for data processing.”

4. noun

short for standard, in computing, a library of reusable code

“The program used the std library to handle user input.”