# PST

Source: https://englishreference.com/word/pst
Updated: 2026-08-27

## Senses

### 1. Pacific Standard Time

noun · CEFR B2 · American English

Stands for Pacific Standard Time. This is the time zone used on the west coast of North America during the winter.

For teachers: Abbreviation for Pacific Standard Time. This time zone is eight hours behind Coordinated Universal Time (UTC-8).

- The online meeting is scheduled for 10:00 AM PST, so please check your local time.
- The broadcast is slated for a 7:00 PM PST premiere to ensure maximum viewership across the West Coast markets.

Usage: Usually written in capital letters after the clock time.

### 2. Provincial Sales Tax

noun · CEFR C1 · Dialect · Technical

Stands for Provincial Sales Tax. This is a tax added to the price of goods and services in some Canadian provinces.

For teachers: Abbreviation for Provincial Sales Tax. A retail tax collected at the provincial level in Canada, distinct from the federal GST.

- The price on the tag does not include PST, so the total will be higher at the register.
- Small business owners in British Columbia must register to collect PST if their annual taxable sales exceed the established threshold.

Usage: Commonly used in Canadian financial and retail contexts.

### 3. Proto-Sino-Tibetan

noun · CEFR C2 · Academic · Technical

Stands for Proto-Sino-Tibetan. This is the ancient language that experts believe modern Chinese and Tibetan languages come from.

For teachers: Abbreviation for Proto-Sino-Tibetan. The reconstructed common ancestor of the Sino-Tibetan language family.

- Linguists compare modern words to PST to see how the languages changed over time.
- The researcher proposed a new phonological reconstruction for the PST root meaning 'water' based on recent dialectal evidence.

## Examples

- The theory of PST suggests that the past still exists.
- In his lecture on the philosophy of time, the professor compared PST to a film strip where every frame exists simultaneously.
- Adopting a PST perspective allows physicists to treat time as a geometric dimension, effectively removing the subjective 'flow' of time that humans experience in daily life.

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