1. a marriage which is likely to be happy and successful because the two people are very well suited to each other.

Jane and Pete had exactly the same likes and interests - it was a marriage made in heaven.

2. a combination of two things or two people which is very successful.

Strawberries and cream are a marriage made in heaven.

• a stalking horse
• a standard-bearer
• a steady hand on the tiller
• a step in the right direction
• as the crow flies
• as the spirit moves
• as the spirit moves you
• as they come
• as things stand
• a sticking point
• a stick-in-the-mud
• a stick to beat someone with
• a stick to beat something with
• a stiff upper lip
• a sting in the tail
• a stitch in time.
• a stitch in time saves nine.
• a stone's throw
• a stool pigeon
• a storm in a teacup
• as to the manner born
• as tough as nails
• a straight arrow
• a straight shooter
• a straw in the wind