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English Words Starting With B

10,030 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)

brain death
nounC1/C2
/ˈbreɪn ˌdeθ/Irreversible cessation of all brain function, including the brainstem, used as a legal and medical definition of death.
brain drain
nounC1
/ˈbreɪn dreɪn/The emigration of highly skilled or educated people from one country or region to another, typically for better pay or living conditions.
brain fart
nounC1/C2
/ˈbreɪn ˌfɑːt/A temporary mental lapse or sudden failure to think clearly, resulting in forgetfulness or a ridiculous statement.
brain fever
nounVery Low
/ˈbreɪn ˌfiːvə/A dated, non-specific medical term historically used to describe a severe inflammatory condition of the brain, often involving symptoms like high fever, delirium, and intense headache.
brain fingerprinting
nounC2
/breɪn ˈfɪŋɡəprɪntɪŋ/A forensic technique that measures brainwave responses to specific stimuli to determine if a person has particular knowledge or memories.
brain fog
nounMedium-High
/ˈbreɪn ˌfɒɡ/A temporary state of mental confusion, lack of clarity, and inability to concentrate or think clearly.
brain freeze
nounMedium
/ˈbreɪn friːz/A sudden, intense headache-like pain in the forehead or temples caused by consuming something very cold too quickly.
brain gain
nounC1/C2
/ˈbreɪn ˌɡeɪn/The net inflow of highly skilled or educated individuals into a country or region.
brain scan
nounC1
/ˈbreɪn skæn/A medical image of the brain produced by scanning technology, used to examine its structure or function.
brain trust
nounC1
/ˈbreɪn ˌtrʌst/A group of expert advisors who provide ideas and solutions, especially to a political leader or organization.
brain truster
nounLow to Mid
/ˈbreɪn ˌtrʌs.tə/A member of a group of expert advisors, especially one who provides intellectual or strategic guidance to a political leader, government, or organisation.
brain tsunami
nounLow
/breɪn tsuːˈnɑːmi/A massive wave of abnormal brain activity that follows a severe injury, such as spreading depolarisation, leading to further damage.
brain up
verbLow
/ˈbreɪn ʌp/To prepare mentally, to focus one's thoughts, to gear up for intellectual activity.
brain wave
nounC1
/ˈbreɪn weɪv/A rhythmic pattern of electrical activity in the brain, as measured by an electroencephalogram (EEG).
brain-fever bird
nounVery Low / Rare
/ˌbreɪn ˈfiːvə ˌbɜːd/A common name for a cuckoo species (the Common Hawk-Cuckoo, *Hierococcyx varius*) known for its distinctive, repetitive, loud call.
brain-picking
nounC2 (Very Low)
/ˈbreɪn ˌpɪk.ɪŋ/The act of questioning someone in detail, often an expert, to gain their knowledge, ideas, or advice.
brain-teaser
nounB2
/ˈbreɪn ˌtiːzə/A puzzle or problem that requires careful thought to solve.
brainbox
nounC1
/ˈbreɪn.bɒks/A very intelligent person; someone who is exceptionally clever or intellectually gifted.
braincase
nounC2
/ˈbreɪnkeɪs/The bony structure of the skull that encloses and protects the brain; cranium.
brainchild
nounB2
/ˈbreɪntʃaɪld/A creative idea, invention, or project that is the result of someone's mental effort and intellectual creation.

Showing 7621–7640 of 10030 words.