pass-through

1. An opening between two rooms, especially a shelved space between a kitchen and dining room that is used for passing food.
2. A route through which something is permitted to pass.
3. A security that passes through payments made by debtors, thus providing investors with regular returns. Also called pass-through security.
4. See pass-along.

1. Operating Expenses that can be charged to the Tenant along with the usual Rent, as defined in the Lease.
Example: Common pass-throughs in commercial leases areTax Stops, Stop Clauses and Common Area Maintenance (CAM).

2. Same as Pass-Through Certificates.

1. An opening in a partition for passing things from one adjoining space to another, usually between a kitchen and a dining space in a dwelling, but also between any two spaces in a building.
2. A provision in a lease that makes the tenant, rather than the owner, directly responsible for certain costs.

The verb has 3 meanings:

Meaning #1: make a transit
  Synonyms: transit, pass across, pass over

Meaning #2: cause to move through

Meaning #3: pass through an enemy-line; in a military conflict
  Synonym: infiltrate