To mend by sewing on a piece or pieces of cloth, leather, or the like
My coat needs patching.
To mend with pieces; to repair by fastening pieces on.
To make out of pieces or patches, like a quilt.
To join or unite the pieces of; to patch the skirt.
To employ a temporary, removable electronic connection, as one between two components in a communications system.
(generally with the particle "up") To repair or arrange in a hasty or clumsy manner
The truce between the two countries has been patched up.
To make the changes a patch describes; to apply a patch to the files in question. Hence:
To connect two pieces of electrical equipment using a cable.
I'll need to patch the preamp output to the mixer.
The act of one who patches.