pp. 到期

[ adj ]
having come to an end or become void after passage of a period of time
<adj.all>
an expired passportcaught driving with an expired license

Expire \Ex*pire"\, v. t. [imp. & p. p. {Expired}; p. pr & vb. n.
{Expiring}.] [L. expirare, exspirare, expiratum, exspiratum;
ex out + spirare to breathe: cf. F. expirer. See {Spirit}.]
1. To breathe out; to emit from the lungs; to throw out from
the mouth or nostrils in the process of respiration; --
opposed to {inspire}.

Anatomy exhibits the lungs in a continual motion of
inspiring and expiring air. --Harvey.

This chafed the boar; his nostrils flames expire.
--Dryden.

2. To give forth insensibly or gently, as a fluid or vapor;
to emit in minute particles; to exhale; as, the earth
expires a damp vapor; plants expire odors.

The expiring of cold out of the inward parts of the
earth in winter. --Bacon.

3. To emit; to give out. [Obs.] --Dryden.

4. To bring to a close; to terminate. [Obs.]

Expire the term
Of a despised life. --Shak.

expired \expired\ adj.
having come to an end or become void after passage of a
period of time; as, an expired passport; caught driving with
an expired license. Opposite of {unexpired}.
[WordNet 1.5]