A : an act, celebration, or watchword that's been agreed on because the celebration of concerted motion b : something that incites to action Signal is designed to in no way acquire or keep any delicate facts. Signal messages and phone calls can not be accessed by us or other https://telegra.ph/Signal%E5%AE%89%E5%85%A8%E5%8A%A0%E5%AF%86%E9%80%9A%E8%AE%AF%E7%9A%84%E9%A6%96%E9%80%89%E5%BA%94%E7%94%A8-01-20