# abac

Source: https://englishreference.com/word/abac
Updated: 2026-05-01

## Senses

### 1. security access control

noun · CEFR C2 · Technical

a way to control who can see data based on their characteristics, like their job or location.

For teachers: an acronym for Attribute-Based Access Control; a security paradigm that grants access rights based on the evaluation of attributes rather than roles.

- The company switched to ABAC to give employees better access to the files they need.
- Implementing ABAC allows the security team to define granular policies that consider the user's department, geographic location, and current device security posture.

Usage: Usually treated as an uncountable noun or an acronym.

### 2. calculation chart

noun · CEFR C2 · Technical · Archaic

a special chart or diagram used to solve math problems without a calculator.

For teachers: a nomogram; a graphical calculating device consisting of a two-dimensional diagram designed to allow the approximate graphical computation of a mathematical function.

- Engineers used to use an abac to quickly find the results of complex equations.
- Before the ubiquity of digital calculators, the abac served as a vital tool for pilots and engineers to perform rapid field calculations.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.