Meaning of じさく in Japanese

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Definition of じさく

じさく(jisaku) 【自作】

(n, vs, adj-no) one's own work
彼はその少女のために自作の曲を一曲弾いた。
He played the girl a piece of music of his own writing.

じさくのう(jisakunou) 【自作農】

じさくじえん(jisakujien) 【自作自演】

(n, vs) performing a part in one's own play; playing a musical piece that one has written
doing everything by oneself (from preparation to execution)
put-up job; charade
sock-puppeting (i.e. pretending to be more than one person on the Internet)