Clash

1. n. Opposition; contradiction; as between differing or contending interests, views, purposes, etc.
2. v. i. To make a noise by striking against something; to dash noisily together.
3. v. i. To meet in opposition; to act in a contrary direction; to come onto collision; to interfere.
4. v. t. To strike noisily against or together.
5. n. A loud noise resulting from collision; a noisy collision of bodies; a collision.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.