(1):

(v. i.) To sound with a clank.

(2):

(n.) A sharp, brief, ringing sound, made by a collision of metallic or other sonorous bodies; - usually expressing a duller or less resounding sound than clang, and a deeper and stronger sound than clink.

(3):

(v. t.) To cause to sound with a clank; as, the prisoners clank their chains.