Looking for the meaning or definition of the word filk? Here's what it means.
Adjective
(music) About or inspired by science fiction, fantasy, horror, science, and/or subjects of interest to fans of speculative fiction; frequently, being a song whose lyrics have been altered to refer to science fiction; parodying. (However, much filk music is original rather than parodic.)
In the construction "filk of...": a filk song written as a parody of, or in the form of and with reference to, another song (which need not itself be a filksong). Compare verb transitive sense.
Verb
(intransitive) To perform filk music.
(intransitive) To participate in a filk circle, including singing along.