'Necking' definitions:

Definition of 'necking'

From: WordNet
noun
The molding at the top of a column [syn: gorgerin, necking]
noun
Affectionate play (or foreplay without contact with the genital organs) [syn: caressing, cuddling, fondling, hugging, kissing, necking, petting, smooching, snuggling]

Definition of 'Necking'

From: GCIDE
  • Necking \Neck"ing\, n. Same as Neckmold. [1913 Webster]

Definition of 'Necking'

From: GCIDE
  • Neck \Neck\, v. t. [imp. & p. p. Necked; p. pr. & vb. n. Necking.] (Mech.) To reduce the diameter of (an object) near its end, by making a groove around it; -- used with down; as, to neck down a shaft. [1913 Webster]

Definition of 'necking'

From: GCIDE
  • neck \neck\, v. i. To kiss and caress amorously. [Colloq.] -- n. necking. [PJC]