Wireless communications outage
No. It means 1 out of 5 symbols was not able to be decoded. Beyond that it depends on your encoding scheme and criteria for deciding if that packet is usable. For example what if you used an encoding scheme with BPSK symbols such that 1 1 1 1 1 = "1" and -1 -1 -1 -1 -1 = "0"?   (You could replace those with other codes as well 1 1 -1 -1 1 = "1" and -1 -1 1 1 -1 = "0" for example). Typically the packet is longer and error correction encoding is used so that individual symbol errors would not cause the entire packet to be lost.