noun k-line one of a series of lines (K-series) in the x-ray spectrum of an atom corresponding to radiation (K-radiation) produced by the transition of an electron to the K-shell. 1
noun k-line (IRC) The line in an IRCd configuration file that records the hostname of a banned user. 0
verb k-line (Transitive Verb) (IRC) To ban a user from a server. 0
