SINCE 1828
dictionary
thesaurus

STP

noun
Save Word
\ ˌes-ˌtē-ˈpē How to pronounce STP (audio) \

Definition of STP

 (Entry 1 of 2)

: a hallucinogenic drug chemically related to mescaline and amphetamine

STP

abbreviation

Definition of STP (Entry 2 of 2)

1 shielded twisted pair
2 standard temperature and pressure

First Known Use of STP

Noun

1967, in the meaning defined above

History and Etymology for STP

Noun

probably from STP, a trademark for a motor fuel additive

Learn More About STP

Dictionary Entries Near STP

stowre

STP

stpd

See More Nearby Entries 

Statistics for STP

Cite this Entry

“STP.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/STP. Accessed 30 Jun. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for STP

STP

noun
\ ˌes-ˌtē-ˈpē How to pronounce STP (audio) \

Medical Definition of STP

 (Entry 1 of 2)

: a hallucinogenic drug chemically related to mescaline and amphetamine

— called also DOM

STP

abbreviation

Medical Definition of STP (Entry 2 of 2)

standard temperature and pressure

WORD OF THE DAY

scintillate

Listen to the pronunciation of scintillate

See Definitions and Examples »

Test Your Vocabulary

Name That Food

  • a-light
  • Name these cookies!
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play
Ask the Editors
Word Games