Grammar. 1  Also called objective case. (in English and some other languages) a case specialized for the use of a form as the object of a transitive verb or of a preposition, as him in The boy hit him, or me in He comes to me with his troubles. 2  a word in that case.
pinning-a mutual promise of a couple not to date anyone else; on college campuses it was once signaled by the giving of a fraternity pin. promise-a verbal commitment by one person to another agreeing to do (or not to do) something in the future.
While models that are used for display purposes do not often require pinning, heavy models that are frequently handled will often benefit from pinning to ensure that the model does not come apart. Some modellers also use Blu Tack or another temporary adhesive as an aid when pinning.