Acquiescence: Action or inaction which legally binds someone, even unintentionally. For example, an action such as accepting goods from a supplier will be binding if it implies recognition of the terms of a contract.

Act of God: An event resulting from natural causes, without human intervention (such as floods or earthquakes). Insurance policies often exclude acts of God.

Action: Proceedings in a civil court.

Adjournment: Postponement of a hearing by a judge on whatever terms he sees fit.

Administrative law: Law which applies to hearings before quasi-judicial or administrative tribunals. Such hearings must be conducted in accordance with the principles of natural justice, such as audi alteram partem and nemo judex in sua causa.

Administrator: A person appointed to manage the property of another (such as the administrator of the estate of someone who has died without leaving a will).

ADR: Alternative dispute resolution (such as arbitration, mediation and conciliation).

Adverse possession: Possession of land, without legal title, for long enough – normally 12 years – to be recognized as the legal owner (“squatter”s rights”).

Affidavit: Sworn written statement signed by a deponent, who swears that its contents are true to the best of his knowledge and belief. It must be witnessed by a practising solicitor or commissioner for oaths.