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English Words Starting With A

8,734 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)

alfonso xii
nounC2
/ælˌfɒn.səʊ ˈtwel.fθ/A historical figure: King of Spain from 1874 to 1885.
alfonso xiii
nounVery Low
/ælˈfɒn.səʊ ðə ˈθɜː.tiːnθ/The proper name of a specific historical figure: King Alfonso XIII of Spain, who reigned from 1886 until 1931.
alford plea
nounlow
/ˈɔːlfɔːd pliː/A guilty plea in a criminal case where the defendant maintains their factual innocence but concedes that the prosecution has sufficient evidence to secure a conviction.
alforja
nounLow / Archaic
/ælˈfɔːdʒə/A pair of saddlebags or panniers slung across the back of a pack animal.
alfred
nounLow
/ˈæl.frɪd/A male given name of Old English origin, meaning 'elf counsel' or 'wise counselor'.
alfred the great
nounC1
/ˌælfrɪd ðə ˈɡreɪt/The 9th-century Anglo-Saxon king of Wessex (849–899), renowned for defending England against Viking invasions and promoting scholarship and legal reform.
alfur
nounLow (Specialist)
/ˈælfə/A member of a small indigenous ethnic group inhabiting parts of Indonesia (primarily northern Halmahera and surrounding islands in North Maluku). Also refers to their Austronesian language.
alfven
nounVery Low
/ˈælvɛn/A proper noun referring to Hannes Alfvén, a Swedish physicist and Nobel laureate, or phenomena named after him.
alfven wave
nounVery low
/ˈɑːlvɛn weɪv/A type of magnetohydrodynamic wave that travels along magnetic field lines in a plasma, where ions oscillate while electrons provide a neutralizing background.
algae
plural-nounB2
/ˈælɡiː/A group of simple, non-flowering, aquatic organisms that includes seaweeds and many single-celled forms, capable of photosynthesis.
algar
nounVery low
/ˈæl.ɡɑː/A rare or regional English term for a natural underground conduit or channel formed by water dissolving limestone, often found in chalk landscapes.
algaroth powder
nounVery Low / Obsolete
/ˈælɡəˌrɒθ ˈpaʊdə/A historical, obsolete medicinal compound
algarroba
nounC1
/ˌalɡəˈrəʊbə/The edible pod of the carob tree, or the tree itself (genus Ceratonia).
algarve
nounC1
/ælˈɡɑːv/A region in southern Portugal, known for its coastline, beaches, and tourism.
algebra
nounC1
/ˈældʒɪbrə/A branch of mathematics dealing with symbols, variables, and the rules for manipulating them to solve equations and understand mathematical structures.
algebra of sets
nounLow/Technical
/ˈaldʒɪbrə əv ˈsets/A collection of sets closed under the operations of union, intersection, and complement, subject to specific axioms, used as a formal system in set theory and probability.
algebraic equation
nounLow frequency in general discourse; high frequency in academic (mathematics, physics, engineering) and technical contexts.
/ˌæl.dʒɪˈbreɪ.ɪk ɪˈkweɪ.ʒən/A mathematical statement that uses algebraic expressions, containing variables and constants, connected by an equals sign, asserting equality.
algebraic expression
nounC1+
/ˌæl.dʒɪˌbreɪ.ɪk ɪkˈspreʃ.ən/A mathematical phrase made from numbers, variables, and operation symbols (such as +, -, ×, ÷, and exponents), without an equality sign.
algebraic extension
nounVery Low
/ˌæl.dʒəˌbreɪ.ɪk ɪkˈsten.ʃən/In abstract algebra, a field extension L/K where every element of L is algebraic over K (i.e., satisfies a polynomial equation with coefficients in K).
algebraic function
nounC1/C2
/ˌæl.dʒɪˌbreɪ.ɪk ˈfʌŋk.ʃən/A mathematical function defined using a finite combination of algebraic operations: addition, subtraction, multiplication, division, and raising to a rational power.

Showing 3041–3060 of 8734 words.