interlock
verb (used without object)
to fit into each other, as parts of machinery, so that all action is synchronized.
Used to express a completed action that took place before another specific past action occurred.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Within, soft rubber-faced cushions had interlocked; the body would fasten to the headpiece in the same way.
From The Finding of Haldgren by Diffin, Charles Willard