Post-transcriptional biological modification of messenger, transfer, or ribosomal RNAs or their precursors. It includes cleavage, methylation, thiolation, isopentenylation, pseudouridine formation, conformational changes, and association with ribosomal protein.

Synonyms: Post-Transcriptional RNA Modifications, RNA Modifications, Post-Transcriptional, RNA Processing, Post-Transcriptional, RNA Modification, Post-Transcriptional, Post Transcriptional RNA Processing, Modifications, Post-Transcriptional RNA, Processing, RNA, RNA Processing, RNA Processing, Post Transcriptional, Post-Transcriptional RNA Modification, RNA Processing, Posttranscriptional, Post-Transcriptional RNA Processing, Post Transcriptional RNA Modification, Posttranscriptional RNA Processing, Processing, Posttranscriptional RNA, Modification, Post-Transcriptional RNA