Definition of deposit

i. Anything laid down. Formerly applied only to matter left by the agency of water, but now includes mineral matter in any form that is precipitated by chemical or other agent, as the ores in veins.

ii. Mineral deposit or ore deposit is used to designate a natural occurrence of a useful mineral, or an ore, in sufficient extent and degree of concentration to invite exploitation.

iii. Earth material of any type, either consolidated or unconsolidated, that has accumulated by some natural process or agent. The term originally applied to material left by water, but it has been broadened to include matter accumulated by wind, ice, volcanoes, and other agents.

Compare with: sediment

iv. An informal term for an accumulation of ore or other valuable earth material of any origin.

Ref: AGI

v. Verb. To lay down or let drop by a natural process; to become precipitated.

Ref: AGI