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English Words Starting With F

5,868 entries — pick a word to see its definition, pronunciation, and usage.

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Noun Verb Adjective Adverb Plural noun Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

flag of truce
nounC2
/ˌflæɡ əv ˈtruːs/A white flag used to signal a desire to cease hostilities temporarily, typically for negotiation or surrender.
flag officer
nounC1/C2
/ˈflæɡ ˌɒf.ɪ.sə(r)/A senior naval officer entitled to fly a flag to indicate their rank and command, typically an admiral or equivalent.
flag out
verbC1-C2
/flæɡ aʊt/To register a ship or vessel under a foreign country's flag (typically for tax, regulatory, or operational advantages).
flag rank
nounC2
/flæɡ ræŋk/A high rank in the navy, specifically that of an admiral, commodore, or other officer entitled to fly a personal flag on their ship.
flag seat
nounRare/Technical
/flæɡ siːt/A designated seat reserved for a specific official, typically a flag officer or dignitary.
flag smut
nounSpecialist/Low
/ˈflæɡ ˌsmʌt/A plant disease, particularly of cereals such as wheat and barley, caused by fungi in the genus Ustilago, affecting the leaves and sheaths.
flag station
nounVery low (specialized/technical)
/flæɡ ˈsteɪ.ʃən/A minor railway station where trains stop only when signaled (flagged) to do so, typically by a passenger waiting on the platform.
flag up
verbB2
/flæɡ ʌp/to draw attention to something as important or needing consideration
flag-waver
nounLow
/ˈflæɡˌweɪvə/A person who makes a loud, enthusiastic, and often public display of patriotism or support for a cause.
flag-waving
nounC1
/ˈflæɡ ˌweɪvɪŋ/The act of expressing strong nationalistic or patriotic feelings in a loud, obvious, and often emotional way.
flagellant
adjectivenounC2
/ˈflædʒ.əl.ənt/A person who whips themselves or submits to whipping, especially for religious discipline or sexual pleasure.
flagellata
nounC2
/ˌflædʒəˈlɑːtə/A historical taxonomic class of protozoans characterized by the presence of one or more whip-like structures (flagella) used for movement.
flagellate
adjectivenounverb+1C2
/ˈflædʒ.ə.leɪt/to whip or scourge; to beat with a whip or rod.
flagellation
nounC2 (Low Frequency/Very Advanced)
/ˌflædʒ.əˈleɪ.ʃən/The act of whipping or beating oneself or another as a form of religious discipline, penance, or sexual gratification.
flagellin
nounVery Low Frequency (C2+)
/fləˈdʒɛlɪn/The primary protein that makes up the filament of a bacterial flagellum.
flagellum
nounC2
/fləˈdʒɛləm/A long, slender, whip-like appendage found on certain cells (especially bacteria and sperm cells) used for locomotion.
flageolet
nounLow frequency (C2)
/ˌfladʒəˈleɪ/A small, high-pitched woodwind instrument with a recorder-like fipple mouthpiece, or a kidney bean variety.
flagfish
nounVery Low
/ˈflæɡfɪʃ/A small, colourful freshwater fish of the family Cyprinodontidae, native to Florida.
flagg
nounB1 (Intermediate)
/flaɡ/A piece of cloth, usually rectangular, attached to a pole or rope, used as a symbol of a country, organization, or for signaling.
flagging
adjectivenounC1
/ˈflæɡɪŋ/Becoming tired or less energetic; slowing down; declining in strength or effectiveness.

Showing 2521–2540 of 5868 words.