Browse by letter

English Words Starting With B

10,030 entries — pick a word to see its definition, pronunciation, and usage.

Filter

Parts of speech

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

bohmerwald
nounVery Low
/ˌbəʊ.mi.ən ˈfɒr.ɪst/A low mountain range in Central Europe, forming a natural border between the Czech Republic (Bohemia) and Austria and Germany.
boho
adjectivenounC1
/ˈbəʊ.həʊ/A style or subculture characterized by a free-spirited, artistic, and unconventional lifestyle, often involving eclectic, vintage, or handmade clothing and accessories.
bohol
nounLow
/bəʊˈhɒl/A proper noun referring to an island province in the Philippines, known for its Chocolate Hills and tarsiers.
bohr
nounVery Low
/bɔː/A unit of length in atomic physics equal to the Bohr radius (approximately 5.29×10⁻¹¹ metres), named after physicist Niels Bohr.
bohr atom
nounVery low
/ˈbɔː ˈætəm/An early quantum model of the atom where electrons orbit the nucleus at specific energy levels, developed by Niels Bohr in 1913.
bohr magneton
nounC2
/ˌbɔː ˈmæɡnɪtɒn/A fundamental physical constant that represents the natural unit of magnetic moment for an electron orbiting an atomic nucleus.
bohr model
nounC2
/ˈbɔː ˌmɒd.əl/A simplified model of the atom in which electrons orbit the nucleus in fixed, circular paths (shells) with specific energy levels.
bohr radius
nounvery low
/ˈbɔː ˈreɪdɪəs/The most probable distance between the nucleus and the electron in a hydrogen atom in its ground state, a fundamental physical constant of atomic physics.
bohr theory
nounLow
/ˈbɔː ˈθɪəri/The early quantum theory proposed by Niels Bohr to explain the structure of the atom, particularly the hydrogen atom.
bohrium
nounExtremely Rare
/ˈbɔː.ri.əm/A synthetic, highly radioactive chemical element with atomic number 107.
bohunk
nounVery Low / Archaic-Offensive
/ˈbəʊhʌŋk/A derogatory and offensive ethnic slur historically used in North America to refer to immigrants from Central and Eastern Europe, particularly those of Slavic or Hungarian descent.
boi
nounLow (restricted to specific online/in-group contexts)
/bɔɪ/Informal, intentional misspelling of 'boy', often used in digital culture to denote a specific masculine or masculine-presenting identity, aesthetic, or attitude.
boiardo
nounVery Low
/bɔɪˈɑːdəʊ/A nobleman of high rank in the historical Italian courts.
boieldieu
nounVery Low
/ˌbwɑːlˈdjɜː/A proper noun referring to François-Adrien Boieldieu, a French composer of the late 18th and early 19th centuries, best known for his opéras comiques.
boil
nounverbverb-intransitive+1B1
/bɔɪl/to heat a liquid until it reaches its vaporization point and bubbles form; to cook in boiling water
boil away
verbB2
/ˈbɔɪl əˈweɪ/To evaporate completely through the process of boiling, leaving nothing in the container.
boil down
verbB2
/ˌbɔɪl ˈdaʊn/To reduce a liquid by boiling, causing it to become thicker and more concentrated.
boil over
nounverbB1
/ˌbɔɪl ˈəʊvə(r)/For liquid to rise and spill over the sides of its container during boiling.
boil up
verbB1 (Intermediate)
/ˌbɔɪl ˈʌp/To bring a liquid to boiling point, or for a liquid to reach boiling point; also, to intensify or reach a critical emotional point.
boil-off
nounverbC1
/ˈbɔɪl ɒf/The process where a liquid turns to vapor, especially when intentionally or unintentionally heated until it evaporates or is lost through evaporation.

Showing 6321–6340 of 10030 words.