| built against or attached to a wall | having your services engaged for; or having a job especially one that pays wages or a salary |
| having services contracted for | made useful |
| (used of toothed parts or gears) interlocked and interacting | |
| involved in military hostilities | |
| (of facilities such as telephones or lavatories) unavailable for use by anyone else or indicating unavailability; (`engaged' is a British term for a busy telephone line) | |
| reserved in advance | |
| having ones attention or mind or energy engaged | |
| pledged to be married | |