Ten Thousand Dream Interpretation

by Gustavus Hindman Miller
For a lover to find his lady’s garter, foretells that he will lose caste with her. He will find rivals.

For a woman to dream that she loses her garter, signifies that her lover will be jealous and suspicious of a handsomer person.

For a married man to dream of a garter, foretells that his wife will hear of his clandestine attachments, and he will have a stormy scene.

For a woman to dream that she is admiring beautiful jeweled garters on her limbs, denotes that she will be betrayed in her private movements, and her reputation will hang in the balance of public opinion.

If she dreams that her lover fastens them on her, she will hold his affections and faith through all adverse criticisms.

The Complete Guide to Interpreting Your Dreams

by Stearn Robinson - Tom Corbett
The meaning of a dream featuring garters depends entirely on the action and is as follows:

If your garters were unfastened, it is a warning of danger from bad companions.

To lose a garter indicates coming trouble, but if someone picked it up and gave it back to you, you can expect help from a friend; however, if it was not returned, your problems will be compounded by unexpected treachery.

To dream of finding a garter is a warning that you are currently skating on thin ice and you would be wise to alter your course before you go through.

The Complete Dream Book

by Gillian Holloway
A maiden who dreams of losing her garter is In danger of having her lover jealous and suspicious of a better looking and wealthier man.

A married man who dreams of a garter should watch his step.

It is an omen of keeping company with light and frivolous persons.

A young woman who dreams that her lover fastens a garter on her will keep his affection and belief through all derogatory criticisms.