European Union Agency for Railways

ERA Railway Terminology visual v0 featured

ERA Railway Terminology Collection

Last updated: 12 March 2026

The ERA Railway Terminology Collection gathers terms and abbreviations that are contained in the EU legal framework for railway, technical documents produced by bodies which are engaged in the development of important evolution in the railway system and other relevant glossaries.

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The file you will get by clicking the "Download the full Terminology" button below is in CSV format. To convert it to a readable Excel file:

1. Download the CSV file
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3. Go to Data → Get Data from CSV → select the CSV file you just downloaded
4. The Excel file will be generated (without any encoding issues)

Download the full Terminology

Starting with "M" (399)

ERA Railway Terminology Collection is a consultation tool, developed to support the sharing of information through the actors involved in running the Single European Railway Area (SERA). The responsibility for the correctness, completeness, accuracy, or reliability of the information in ERA RTC lays upon the authors of the definitions, as they derive from reference documents having their own preparation and approval flow. Users cannot call ERA liable for the use they make of the content. Please consider that when the collection is exported (.csv) and then printed or converted, it becomes uncontrolled.
Term Context Document Type Origin document

Missed connection

SERA_EU Transport

Regulation

Regulation (EU) 2021/782 of the European Parliament and of the Council of 29 April 2021 on rail passengers’ rights and obligations (recast)

Missiles ejection

Freight

Glossary

Handbook of scenarios for assessing major chemical accident risks JRC106029 - Ed. 2017

Missing link

International Relations

Regulation

Regulation (EU) 2021/1153 of the European Parliament and of the Council of 7 July 2021 establishing the Connecting Europe Facility and repealing Regulations (EU) No 1316/2013 and (EU) No 283/2014

Mission

ERTMS

Technical Document

ERTMS/ETCS - Glossary of Terms and Abbreviations - version : 4.0.0 - date 05/07/2023

Mission

SMS Safety Culture Human and Organisational Factor

ISO

ISO 9000:2015(en) Quality management systems — Fundamentals and vocabulary

Latest release

Mission, ETCS

ERTMS

Technical Document

ERTMS/ETCS - Glossary of Terms and Abbreviations - version : 4.0.0 - date 05/07/2023

MITI

International Standard

EU Technical Document

CEN CENELEC ABBRAVIATION ACRONYM 2025

MK

International Standard

ISO

ISO 3166 (en) - Online Browsing Platform (OBP) Codes for the representation of names of countries and their subdivisions — Part 1: Country code

ML

International Standard

ISO

ISO 3166 (en) - Online Browsing Platform (OBP) Codes for the representation of names of countries and their subdivisions — Part 1: Country code

MLA

Entity in Charge of Maintenance

Application Guide

Guidance on ECM Certification process Guide for the application of Article 14 of Directive (EU) 2016/798 and Commission Implementing Regulation (EU) No 2019/779 on a system of certification of entities in charge of maintenance for vehicles Version 10.0 on 04/12/2025

MM

International Standard

ISO

ISO 3166 (en) - Online Browsing Platform (OBP) Codes for the representation of names of countries and their subdivisions — Part 1: Country code

MM

Freight

Glossary

Transport of dangerous goods. Risks Management Framework. Framework glossary v. 1.0/2018

mm

EU Policy

Glossary

Glossary for transport statistics - 6TH EDITION 2026

Latest release

MMP

Freight

Glossary

Transport of dangerous goods. Risks Management Framework. Framework glossary v. 1.0/2018

MN

International Standard

ISO

ISO 3166 (en) - Online Browsing Platform (OBP) Codes for the representation of names of countries and their subdivisions — Part 1: Country code

MO

International Standard

ISO

ISO 3166 (en) - Online Browsing Platform (OBP) Codes for the representation of names of countries and their subdivisions — Part 1: Country code

Mobile subsystem

Interoperability

Directive

Directive (EU) 2016/797 of the European Parliament and of the Council of 11 May 2016 on the interoperability of the rail system within the European Union (recast)

Mobile worker

SMS Safety Culture Human and Organisational Factor

Directive

Directive 2003/88/EC of the European Parliament and of the Council of 4 November 2003 concerning certain aspects of the organisation of working time

Mobile worker engaged in interoperable cross-border services

SMS Safety Culture Human and Organisational Factor

Directive

Council Directive 2005/47/EC of 18 July 2005 on the Agreement between the Community of European Railways (CER) and the European Transport Workers’ Federation (ETF) on certain aspects of the working conditions of mobile workers engaged in interoperable cross-border services in the railway sector Agreement concluded by the European Transport Workers' Federation (ETF) and the Community of European Railways (CER) on certain aspects of the working conditions of mobile workers engaged in interoperable cross-border services

Mobility service provider

Energy

Regulation

Regulation (EU) 2023/1804 of the European Parliament and of the Council of 13 September 2023 on the deployment of alternative fuels infrastructure, and repealing Directive 2014/94/EU