When two elements come together that are exactly adapted or suitable to each other. To be the precise size and shape for.
When Jessica put her head down on James shoulder they found that it was a perfect fit.
by Alchemist007 February 12, 2010
Someone who is cast for a role that is destined for them. Synonymous to a key and a lock, one key in a draw of many other keys. Only one fits the lock, and this is it, two people who are just destined to be together, two people who don’t even know how good they are as one.

Two people who perfect for one another, befitting of true love, of lock and key.
Nick and Charlie are the perfect fit for each other, they both compliment so perfectly.
by heart has stopped April 25, 2022