English Reference
Noun

reconnaissance

n. uncountable
C1 Advanced US /ɹiˈkɑnəsəns/ UK /ɹɪkˈɒnɪsəns/ re·con·nais·sance UK spelling reconnaissances

n.the act of going to a place to get information, usually about an enemy or a new area. You use this when you need to check a situation before taking action.

n.the process of obtaining information about the activities and resources of an enemy or potential enemy, or the physical characteristics of a particular area. Often involves preliminary surveying or research before a larger operation.


SIMPLE

The team did some reconnaissance before starting the project.

CONTEXTUAL

The scouts performed a quick reconnaissance of the valley to ensure no obstacles blocked the path for the main group.

COMPLEX

Satellite reconnaissance provides high-resolution imagery that allows analysts to monitor infrastructure developments without the need for physical presence in restricted territories.

Usage

Often used in military or technical contexts; frequently appears in the shortened informal form 'recon'.

Pitfall
They made a reconnaissance about the areaThey did reconnaissance on the area

Reconnaissance is typically paired with the verbs 'do', 'perform', or 'carry out', and takes the preposition 'on' or 'of'.

It also showed Bowie taking cellphone pictures outside the state capitol, allegedly as part of a “reconnaissance” operation.

Al Jazeera· 20 Aug 2026

Prosecutors say she visited the building at least five times on reconnaissance missions ahead of the attack.

BBC News· 20 Aug 2026

Borrowed from French reconnaissance (“recognition”). Doublet of recognizance.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated