1. A joint ally.

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

• xo-ally,
• vo-ally,
• fo-ally,
• do-ally,
• ci-ally,
• ck-ally,
• cl-ally,
• cp-ally,
• c0-ally,
• c9-ally,
• co0ally,
• copally,
• co-zlly,
• co-slly,
• co-wlly,
• co-qlly,
• co-akly,
• co-aply,
• co-aoly,
• co-alky

The adjective form of "co-ally" is "co-alley".

The plural form of "Co-ally" is "Co-allies".

The singular form of the word "Co-ally" is "Co-ally". The word remains the same in both singular and plural forms.