There are multiple definitions - click on the translation that matches your context.

伪造

动词

full

forge

verb

Definitions of forge

to create a relationship, situation or new conditions

The European Union has launched a plan to forge close political and economic ties with six former Soviet republics.

to make a copy of a document, bank note, signature, painting etc. and use it illegally as if it were an original, in order to deceive

A 17 year old pupil faces fines for forging documents of over £250.