-io

an action, process, or result

Forms

-io
-ion- — The longer form used before Latin endings.
-ion — The form carried into many English nouns.

Origin

An old Latin noun ending, inherited from earlier Indo-European word formation.

Note

The ending can name both an activity and what that activity produces.

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noun

definition

def-ih-NISH-un/ˌdefɪˈnɪʃn/

The clear establishment of boundaries or distinguishing features.

The entry gives a triangle's definition by identifying its three sides.

A plain open dictionary-like reference book showing one simple triangle symbol paired with three tiny side-mark strokes in a neat entry, and a teacher indicating the entry to a learner.

Etymology

deLatindown, away; removal

+finitLatinlimit, bound, or finish

+ionLatinan action, process, or result

Completely setting boundaries became a way of stating a thing's limits and distinctive nature. A definition does this for meaning: it marks out what a word or idea includes.

In context

Proofed1:53

basic format for a glossary is a list of words in alphabetical order each word should be followed by a definition that explains what the word means

How to Write a Glossary for Tricky Terminology

More examples

The two laws use different definitions of public property.
Better lighting gives the shapes in the photograph more definition.
Regular strength training improves muscle definition in her arms.

Forms

definition · definitions

define verb — To establish something's meaning, limits, or features.

Similar words

delineation: Emphasizes tracing or describing boundaries and features precisely.
clarity: Emphasizes ease of perception or understanding rather than established boundaries.
sharpness: Emphasizes crisp edges and details, especially in images.