If the collar was clean, your mate or current heart interest, as the case may be, is reliable; but if the collar’was soiled or tom, you could either be deceiving yourself or being deceived.... The Complete Guide to Interpreting Your Dreams
Collars represent confinement and restraint (e.g., to “collar” someone). They also indicate completing or finishing something, as in putting the collar on a garment. Collars often are an indication of control (e.g., prisoners) or a token of subservience (e.g., slaves).
This kind of dream may well describe a frustrated work situation or a confining relationship.... Dream Symbols in The Dream Encyclopedia
(Collar; Neckband; Neckwear) In a dream, a collarband represents the pleasure and pride of a mother or a wife to see her sons or daughter having a jewelry business.
If an unmarried woman sees herself in a dream wearing a neckband, a necklace or a collarband made from pearls, peridot or chrysolite, it means that she will marry a noble and a high ranking man, beget children from him and find her ultimate pleasure and love in such a marriage.
If the collarband is made from alum, then it means marrying a young eastern man.
If the collarband is made from beads in the dream, it means that her husband is a mean and a contemptible person. Ifa man sees himselfwearing a collarband in a dream, it means suffocation, distress or a quarrel.
(Also see Neckband; Necklace)... Islamic Dream Interpretation