What are easy-to-understand definitions I could use for these list of terms?

protein synthesis-The process in which the genetic code carried by messenger RNA directs cellular organelles called ribosomes to produce proteins from amino acids

RNA splicing-The process by which introns are removed and exons are joined together from an RNA transcript to produce an mRNA molecule.

RNA polymerase- an enzyme that synthesises RNA, usually from a DNA template.

Transcription- something written, especially copied from one medium to another, as a typewritten version of dictation

Translation- a written communication in a second language having the same meaning as the written communication in a first language

Template Strand- The strand of the DNA double helix that is copied by base pair complementarity to make an RNA. The other, non-template strand of the DNA duplex has a sequence that is identical to the synthesized RNA (except in RNA, U replaces T).

Protein Synthesis - synthesis means "creation", so protein synthesis is the creation of protein (from amino acids)
Transcription - "transcribe" = to copy something onto something else; transcription is copying DNA codes onto a strand of RNA (though they are the opposite codes since bases can only bind to opposite bases, e.g., C to G) This is done by the enzyme RNA polymerase ("-ase" = enzyme)
Translation - DNA codes are "translated" into protein codes

In protein synthesis DNA pretty much tells the cells to produce amino acids and proteins.  (Protein Synthesis = creation of proteins using DNA and RNA).  Before the creation of protein begins transcription occurs (DNA is transferred into RNA) in which the RNA polymerase acts as an "unzipper" and breaks the DNA strand into two parts.  The one half of the DNA strand (the template strand) is copied by the RNA polymerase and creates a messenger RNA (mRNA).