1. Having two forms.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• biforn,
• viform,
• niform,
• hiform,
• giform,
• buform,
• bjform,
• bkform,
• boform,
• b9form,
• b8form,
• bidorm,
• bivorm,
• bigorm,
• bifirm,
• bifom,
• bifrom,
• byform,
• bifurm,
• bifurom

• bloom,
• boom,
• form,
• perform,
• deform,
• firm,
• bosom,
• before,
• broom,
• affirm,
• farm,
• foam,
• reform,
• by far.

The adjective form of the word "biform" is "biformed".

The plural form of the word "biform" is "biforms".

The singular form of the word "biform" is "biform".