verb
To physically lay or place (something) on another thing; to deposit, to put, to set.
To apply, enforce, or establish (something, often regarded as burdensome as a restriction or tax: see verb, sense 1.2.1) with authority.
Chiefly followed by on or upon.
(intransitive) Chiefly followed by on or upon.
noun
(obsolete) An act of placing or putting on something chiefly immaterial, especially something regarded as burdensome as a duty, a task, etc.; an imposition.