| 1. | to come into opposition, as one thing with another, esp. with the effect of hampering action or procedure (often fol. by with): Constant distractions interfere with work. |
| 2. | to take part in the affairs of others; meddle (often fol. by with or in): to interfere in another's life. |
| 3. | (of things) to strike against each other, or one against another, so as to hamper or hinder action; come into physical collision. |
| 4. | to interpose or intervene for a particular purpose. |
| 5. | to strike one foot or leg against another in moving, as a horse. |
| 6. | Sports.
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| 7. | Physics. to cause interference. |
| 8. | to clash; come in collision; be in opposition: The claims of two nations may interfere. |
| 9. | Law. to claim earlier invention when several patent requests for the same invention are being filed. |
| 10. | interfere with, Chiefly British. to molest sexually. |