1. The widow's third part of the estate of a deceased husband.

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

• thids,
• thirsd,
• thirtsy,
• thirdty,
• therd,
• thimas,
• thiss,
• thiird,
• thirdy,
• thorws,
• thris,
• thils,
• theads,
• thoird,
• thios,
• thiries,
• thirtes,
• thiis,
• thisd,
• thirt

• threads,
• thirties.

The adjective form of the word "thirds" is "third".