The term "fixtures" is one of doubtful meaning, being used in different works and decisions in a diametrically opposite significance. Applied in the former sense is to apply the terms trade, agricultural and domestic fixtures to those fixtures which may be severed from the land contrary to the general rule. Ordinarily, however, personal property is annexed to the land in a substantial and permanent manner and becomes itself, real property. Also what is known as constructive annexation which exists in the case of those articles which are not fastened to the realty themselves are made for the purpose of being used in connection with property so annexed. Keys and blinds would furnish illustrations of constructive annexation.

The law makes exceptions to the general rule governing annexation in the case of property annexed to the realty by the person rightfully in possession, but not the owner, for trade in domestic or agricultural purposes. Such can be removed, provided such removals will not inflict substantial injury upon the property, and provided also, that the property is severed from the realty before the termination.