Gesture, motion (3)
I believe the answer is:
nod
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">gesture</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that gesture is the is a more specific form of the action of nod.)</span><br/ ><br/ >'<span class="explanation-format__original">motion</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that motion is the is a more specific form of the action of nod.)</span><br/ ><br/ ></span>
(Other definitions for nod that I've seen before include "Go to sleep in this land" , "overlook something" , "Cain was banished to the land of ..." , "Move head in agreement" , "Sign of assent or salutation" .)