std

/EH1 S T IY1 D IY1/
noun
  1. 1

    A principle or example or measure used for comparison.

  2. 2

    A vertical pole with something at its apex.

  3. 3

    A manual transmission vehicle.

  4. 4

    The upper petal or banner of a papilionaceous corolla.

  5. 5

    An inverted knee timber placed upon the deck instead of beneath it, with its vertical branch turned upward from that which lies horizontally.

  6. 6

    A large drinking cup.

  7. 7

    Standard idiom, a prestigious or standardized language variety; standard language

noun
  1. 1

    A measure of how spread out data values are around the mean, defined as the square root of the variance. Represented with the Greek letter ฯƒ.

Source: https://en.wiktionary.org/wiki/standard, https://en.wiktionary.org/wiki/standard%20deviation, https://en.wiktionary.org/wiki/std