Englishfor English speakers
a
Determinative
—
A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
—
A is the first letter of the alphabet.
The letter "a" comes before "b".
—
In some schools, an A is a very high grade.
Ron got an A on his earth science test.
corona
—
noun
(= aureole)
the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse
—
noun
one or more circles of light seen around a luminous object
—
noun
(botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower
—
noun
(anatomy) any structure that resembles a crown in shape
—
noun
a long cigar with blunt ends
—
noun
(= corona discharge)
an electrical discharge accompanied by ionization of surrounding atmosphere