See signal in Webster's New World Roget's A-Z Thesaurus II
noun
An expressive, meaningful bodily movement:
gesticulation, gesture, indication, motion, sign. (Informal) high sign. See express
adjective
Readily attracting notice:
arresting, bold, conspicuous, eye-catching, marked, noticeable, observable, outstanding, pointed, prominent, pronounced, remarkable, salient, striking. Idiom: sticking out like a sore thumb. See see
verb
To communicate by means of such devices as lights or signs:
flag1, semaphore. See express, wordsTo make bodily motions so as to convey an idea or complement speech:
gesticulate, gesture, motion, sign, signalize. Idiom: give the high sign. See express
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