n.
[语]不定冠词

[ noun ]
a determiner (as `a' or `some' in English) that indicates nonspecific reference
<noun.communication>

Indefinite \In*def"i*nite\, a. [L. indefinitus. See {In-} not,
and {Definite}.]
1. Not definite; not limited, defined, or specified; not
explicit; not determined or fixed upon; not precise;
uncertain; vague; confused; obscure; as, an indefinite
time, plan, etc.

It were to be wished that . . . men would leave off
that indefinite way of vouching, ``the chymists say
this,'' or ``the chymists affirm that.'' --Boyle.

The time of this last is left indefinite. --Dryden.

2. Having no determined or certain limits; large and
unmeasured, though not infinite; unlimited; as, indefinite
space; the indefinite extension of a straight line.

Though it is not infinite, it may be indefinite;
though it is not boundless in itself, it may be so
to human comprehension. --Spectator.

3. Boundless; infinite. [R.]

Indefinite and omnipresent God,
Inhabiting eternity. --W. Thompson
(1745).

4. (Bot.) Too numerous or variable to make a particular
enumeration important; -- said of the parts of a flower,
and the like. Also, indeterminate.

{Indefinite article} (Gram.), the word a or an, used with
nouns to denote any one of a common or general class.

{Indefinite inflorescence}. (Bot.) See {Indeterminate
inflorescence}, under {Indeterminate}.

{Indefinite proposition} (Logic), a statement whose subject
is a common term, with nothing to indicate distribution or
nondistribution; as, Man is mortal.

{Indefinite term} (Logic), a negative term; as, the not-good.

Syn: Inexplicit; vague; uncertain; unsettled; indeterminate;
loose; equivocal; inexact; approximate.