(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.