pleading in the alternative
In civil proceedings, the practice of including in a statement of case two or more inconsistent allegations and inviting the court to grant relief in respect of whichever allegation it finds to be well-founded. Under the Civil Procedure Rules a party may be entitled to set out alternative claims or separate defences in a statement of case, but this is subject to the requirement in Part 22 of the Rules that statements of case must be verified by a statement of truth.

• opinion
• opinion evidence
• OPSI
• option
• optional clause
• option to purchase
• oral agreement
• oral evidence
• orality
• order
• order of committal
• order of discharge
• orders for accounts and inquiries
• Orders in Council
• Orders of Council
• ordinance
• ordinary legislative procedure
• ordinary resolution
• ordinary share
• organ donation
• original evidence
• originating summons
• origin system
• ouster
• ouster of jurisdiction