Dictionary

To place down in a position of rest, or in a horizontal position.

Example: A shower of rain lays the dust.

To cause to subside or abate.

To prepare (a plan, project etc.); to set out, establish (a law, principle).

To install certain building materials, laying one thing on top of another.

Example: lay brick;  lay flooring

To don or put on (tefillin (phylacteries)).