To dream of an alter in any way shape or form signifies that you need to communicate with your inner self through meditation. There are two types of "alters" one found in a church and the other changing something in life, or altering clothes.
The alter is actually an indication of the relationship that you have with yourself. If you can remember what was on the alter this can futher the interpretaion of this dream. An alter means that you need to rely more on your religion to find the answers to questions.
This dream has a number of meanings. Any dream connected to growing spiritually takes on more significance than any other. The symbolism of an Abbey as a retreat is normally a sign that it is time for you to take things easy and think about your life. To dream of an Abbey
To find out what you want from life, to make it clear, from the very beginning is what is needed. You have faced some people with the attitude that it is his/her way or the highway. 
At times your aggression – even violent streak – are close to the surface. You will meet someone that may be charming in a first encounter – but even then there are telltale signs of pent-up abuse. You will notice the interlocutors sense that there is an impending threat and conflict by acquiescing with lies or tales. Be careful of upsetting others which may result in disastrous consequences.
To see an an altar server in your dream means that you need to make the final lap in a project, in order to ease into a situation.
To dream that you to be married at the alter and pronounced (husband or wife) , represents wedded bliss and happiness. A wedding dream can also signify a new baby that may enter your life. To see a wedding in a church, represents your hidden abilities and talents that have not yet come to light or been recognised. A bad wedding (if things go wrong) is also symbolic of the depth of your emotions.
To marry at the alter: see more regarding the dream meaning of wedding by clicking here
