n.[C]

1. 識字課本，初級課本
2. 入門書，初學者讀本，初階
   I borrowed from the library a primer of phonetics.

   我從圖書館借了一本語音學入門書。

   If you are completely a layman on this, here is a primer that you can read.

   如果你真的完全是個門外漢，這裡有一本入門書你可以先讀一下。

3. 【古】（兒童的）識字祈禱書

n.

1. a substance painted on wood, metal, etc. as a preparatory coat.
2. a cap or cylinder containing a compound which ignites the charge in a cartridge or explosive.
3. a small pump for priming an engine.

n.