(advertising) A truck whose sole purpose is to advertise, for example by means of billboards, electronic displays, or music.

present participle of ad-lib

simple past tense and past participle of ad-lib

Improvised, or performed without preparation.

simple past tense and past participle of add up

present participle of add up

Pertinent; relevant.

Pertinently; to the purpose.

plural of ad-lib

(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.