"necks" in the noun sense
1. neck, cervix
the part of an organism (human or animal) that connects the head to the rest of the body
"he admired her long graceful neck"
"the horse won by a neck"
a narrow elongated projecting strip of land
a cut of meat from the neck of an animal
a narrow part of an artifact that resembles a neck in position or form
"the banjo had a long neck"
"the bottle had a wide neck"
5. neck, neck opening
an opening in a garment for the neck of the wearer a part of the garment near the wearer's neck
"necks" in the verb sense
1. neck, make out
kiss, embrace, or fondle with sexual passion
"The couple were necking in the back seat of the car"
Source: WordNet® (An amazing lexical database of English)
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