To improvise all or part of a speech or other performance, especially in comedy.

Initialism of accidental death and dismemberment.

(role-playing games) Initialism of Advanced Dungeons & Dragons.

Initialism of application development and delivery.

in agreement

in sequence; sequentially

sequential

(law) The principle by which property rights extend vertically upwards and, sometimes, downwards from a property; it is used to describe air rights or no-fly zones, as well as rights to resources under the soil, such as mineral rights, among others.

(Internet, advertising) An advertisement which extends horizontally across a web-page. / An advertisement on a banner.

Use of ad hoc or improvised reasoning. / (computing) Arbitrary decision rules sometimes included in artificially intelligent software to simulate the unexpectedness in human reasoning.