noun, verb, -leased, -leas⋅ing.| 1. | the matériel and services supplied by the U.S. to its allies during World War II under an act of Congress (Lend-Lease Act) passed in 1941: such aid was to be repaid in kind after the war. |
| 2. | the two-way transfer of ideas, styles, etc. |
| 3. | to supply (matériel or services) as authorized by the Lend-Lease Act. |
