I. noun
Synonyms: sign 1, high sign
Related Word: alarm, alert, tocsin; movement
II. verb
to notify by or as if by a signal
signaled his wife to keep quiet
Synonyms: flag, gesture, motion, sign, signalize
Idioms: give the high sign (to)
III. adjective
Synonyms: noticeable , arresting, arrestive, conspicuous, marked, outstanding, prominent, remarkable, salient, striking
Related Word: characteristic, distinctive, individual, peculiar, significative; eminent, famous, illustrious, renowned