n. 信号, 暗号, 近因, 导火线

vt. 向...作信号, 标志, 用信号通知

vi. 发信号

a. 作为信号的, 显著的

[计] 信号

[化] 信号

[医] 信号

[经] 信号

Signal \Sig"nal\, n. [F., fr. LL. signale, fr. L. signum. See
{Sign}, n.]
1. A sign made for the purpose of giving notice to a person
of some occurence, command, or danger; also, a sign,
event, or watchword, which has been agreed upon as the
occasion of concerted action.

All obeyed
The wonted signal and superior voice
Of this great potentate. --Milton.

2. A token; an indication; a foreshadowing; a sign.

The weary sun . . .
Gives signal of a goodly day to-morrow. --Shak.

There was not the least signal of the calamity to be
seen. --De Foc.


Signal \Sig"nal\, v. t. [imp. & p. p. {Signaled or Signalled};
p. pr. & vb. n. {Signaling} or {Signalling}.]
1. To communicate by signals; as, to signal orders.

2. To notify by a signals; to make a signal or signals to;
as, to signal a fleet to anchor. --M. Arnold.


Signal \Sig"nal\, a. [From signal, n.: cf. F. signal['e].]
1. Noticeable; distinguished from what is ordinary; eminent;
remarkable; memorable; as, a signal exploit; a signal
service; a signal act of benevolence.

As signal now in low, dejected state
As erst in highest, behold him where he lies.
--Milton.

2. Of or pertaining to signals, or the use of signals in
conveying information; as, a signal flag or officer.

{The signal service}, a bureau of the government (in the
United States connected with the War Department) organized
to collect from the whole country simultaneous raports of
local meteorological conditions, upon comparison of which
at the central office, predictions concerning the weather
are telegraphed to various sections, where they are made
known by signals publicly displayed.

{Signal station}, the place where a signal is displayed;
specifically, an observation office of the signal service.

Syn: Eminent; remarkable; memorable; extraordinary; notable;
conspicuous.