DictionaryAI

rail

RAYL/ɹeɪl/

Pluralrails (some meanings)

Verbrails, railing, railed

22 meanings of rail

Practice

  1. 1
    train transportnoununcountable
    The railroad system considered as a means of transportation for people or freight.

    More travelers are choosing rail to cut their carbon footprint.

    Freight moves cheaply by rail between the two ports.

    UsageTravel or ship by rail, with no a or the, like by air. Also before nouns: rail travel, rail fares.

    Similartrain

  2. 2
    barrier barnouncountable
    A horizontal bar fixed between supports, used to hold onto or to act as a barrier.

    He leaned against the rail to watch the boats in the harbor.

    The balcony rails were freshly painted before the guests arrived.

    UsageYou hold on to or lean on a rail. On stairs it is often called a handrail.

    Similarbar, barrier, balustrade

  3. 3
    metal tracknouncountable
    A metal bar that forms part of the track on which trains run.

    Inspectors walk the track each morning to check every rail for cracks.

    A loose rail caused the train to slow to a crawl.

    UsageOften plural: the rails. Go off the rails also means start behaving badly or go wrong.

  4. 4
    complain angrilyverbintransitive
    To complain bitterly and forcefully about something or against someone.

    Critics rail against the policy in every newspaper column.

    She railed at the council for ignoring local concerns.

    UsageTakes against or at: rail against a policy, rail at fate.

    Similarinveigh, fulminate

    Oppositepraise, applaud

    Note

    A different word again, from Middle French railler, and today it takes a preposition. Nelson Mandela's chief 'railed against the white man', Saki's Major railed 'at fate', and Mark Twain writes 'let them rail on'. Shakespeare could still give it a direct object in The Merchant of Venice: 'Till thou canst raile the seale from off my bond.'

    Checked 2 Nov 2026 · 5 facts

    • The verb meaning to complain forcefully has a separate origin in Middle French railler. en.wiktionary.org
    • Mandela describes Chief Joyi as having 'railed against the white man'; these are Mandela's narrative words. repository.act.ac.rw
    • Saki's narrator describes the Major railing 'at fate' in 'The Bag'. gutenberg.org
    • Twain writes 'Let them rail on' in The Stolen White Elephant; the fictional speaker is Chief Inspector Blunt. gutenberg.org
    • Shakespeare uses rail with the direct object 'the seale' in The Merchant of Venice; Shylock speaks the quoted line. en.wikisource.org
  5. 5
    electronicsnouncountable
    In an electrical circuit, a conductor held at a constant voltage with respect to ground, serving as a common connection for other components.

    Each amplifier stage connects between the supply rail and ground.

    Noise on the power rail can disrupt sensitive measurements.

    Note

    Electronics names each rail by its voltage: a power supply has +12 V, +5 V and 3.3 V rails, and negative ones such as −12 V. 'The 12V rail' is shorthand for everything held at that potential. Michal Necasek's 'Power Trouble' (2019) traces how PC power supplies shifted load from the 5V and 3.3V rails toward 12V because it is more efficient.

    Checked 1 Nov 2026 · 4 facts

    • Power-supply rails are identified by voltage; conventional ATX supplies include +12 V, +5 V, +3.3 V and −12 V outputs. intel.com
    • A voltage rail denotes the common conductor and connections maintained at the stated potential relative to ground. en.wiktionary.org
    • Michal Necasek wrote 'Power Trouble', published in 2019. os2museum.com
    • The article explains that ATX power delivery shifted from the 5 V and 3.3 V rails toward 12 V for greater efficiency. os2museum.com

Practice

Can you tell the meanings of rail apart? Answer 3 quick questions from this page, or write your own sentence and AI will check it.

Origins

Meanings 1–3, 5–7, 9–14

Latin "regō" (to rule, guide, govern) gave "regula" (rule, bar), and this reached English by two paths: Old English "regol," meaning a ruler or straight bar, and Old French "reille." Together they produced Middle English rail. Regal, rule, and several other words are doublets.

Meaning 8

The bird is named for its harsh cry. The name traces from Latin "rādere" (to scrape) through Vulgar Latin "*rasculum" to Old French "rasle," Middle French "raalle," and finally French "râle."

Meaning 4

From Middle French "railler".

Checked 1 Nov 2026 · 1 fact

Meanings 15–16

Old English "hræġl" meant a garment, dress, or robe, and it became Middle English rail. Its cognates include Old Frisian "hreil" and Old High German "hregil" (clothing, garment).

Meanings 17–18

Probably from Anglo-Norman "raier", also Middle French "raier".

Checked 1 Nov 2026 · 1 fact

  • Rail probably derives from Anglo-Norman raier and Middle French raier. en.wiktionary.org