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Synonyms

STP

1 American  
[es-tee-pee] / ˈɛsˈtiˈpi /

abbreviation

Slang.
  1. a street name for the hallucinogen DOM.


STP 2 American  
STP British  

abbreviation

  1. scientifically treated petroleum: an oil substitute promising renewed power for an internal-combustion engine

  2. Also: NTP.  standard temperature and pressure: standard conditions of 0°C temperature and 101.325 kPa (760 mmHg) pressure

  3. Professor of Sacred Theology

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. a synthetic hallucinogenic drug related to mescaline

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of STP

First recorded in 1965–70; origin uncertain; possibly named after STP, trademark of a motor-oil additive

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Maybe Garrett DiGiorgio & Co. can land an NIL deal with STP oil treatment or the Stone Temple Pilots.

From Los Angeles Times • Jul. 29, 2025

Hernandez, of the STP Foundation, said he has received requests from at least one venture capital company that asked for him to host a team-building exercise through graffiti.

From Los Angeles Times • Oct. 17, 2024

Murphy told jurors to consider lost evidence as adverse to STP, and this June the appellate judges found that these and other instructions were proper.

From Seattle Times • Oct. 14, 2022

They denied coverage to both STP and the Washington State Department of Transportation, who were both policyholders, now turned adversaries.

From Seattle Times • Sep. 15, 2022

The 4ESS then calls its own STP, Signal Transfer Point within an SS7 network.

From Terminal Compromise: computer terrorism: when privacy and freedom are the victims: a novel by Schwartau, Winn