# expeditionary

/ˌɛkspəˈdɪʃəˌnɛɹi/ (US) · /ˌɛkspədˈɪʃənəɹi/ (UK) · CEFR C1 · Adjective

Source: https://englishreference.com/word/expeditionary
Updated: 2026-05-19

## Definition

describing a group of people who travel to a faraway place to do a specific job, like a military mission or a scientific study.

For teachers: relating to or intended for an expedition, especially one involving military forces or scientific research. Often describes equipment, personnel, or operations designed for temporary deployment in a foreign or remote location.

## Examples

- The soldiers packed their expeditionary gear for the long journey.
- The government approved the deployment of an expeditionary force to provide humanitarian aid in the disaster zone.
- Modern expeditionary units are designed to be self-sufficient, carrying all necessary logistical support to operate effectively in hostile environments without immediate access to local infrastructure.

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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.