nod nod /ˈnɑːd/

noun

1. () The act of nodding the head  ( nod )
   the act of nodding the head
   
2. () A sign of assent, salutation or command  ( nod )
   a sign of assent, salutation or command
   

verb

1. () Express or signify by nodding  ( nod )
   express or signify by nodding
    He nodded his approval
   He nodded his approval
   
2. () Lower and raise the head, as to indicate assent, agreement or confirmation  ( nod )
   lower and raise the head, as to indicate assent, agreement or confirmation
    The teacher nodded when the student gave the right answer
   The teacher nodded when the student gave the right answer
   
3. () Let the head fall forward through drowsiness  ( nod )
   let the head fall forward through drowsiness
    The old man was nodding in his chair
   The old man was nodding in his chair
   
4. Be almost asleep  ( nod )
   be almost asleep
    The old man sat nodding by the fireplace
   The old man sat nodding by the fireplace
   
5. Sway gently back and forth, as in a nodding motion  ( nod )
   sway gently back and forth, as in a nodding motion
    The flowers were nodding in the breeze
   the flowers were nodding in the breeze