In linguistics, free morphemes are morphemes that can stand alone, unlike bound morphemes, which only occur as parts of words. In the English sentence colorless green ideas sleep furiously, for example, color, green, idea, sleep and furious are all free morphemes, whereas -less, -s and -ly are all bound morphemes.
By contrast, in a synthetic language, words are composed of agglutinated or fused morphemes that denote their syntactic meanings.
In morpheme-based morphology, a morpheme is the smallest lingual unit that carries a semantic interpretation.
Note that the morpheme "der" corresponds to four separate concepts simultaneously, and the morpheme "die" refers to three concepts (German does not distinguish gender in the plural), but the rules relating "der" and "die" in this manner are quite arbitrary, making this set of morphemes fusional in nature.
In morpheme-based morphology, a morpheme is the smallest language unit that carries a semantic interpretation.
Morphemes are, generally, a distinctive collocation of phonemes (as the free form pin or the bound form -s of pins) having no smaller meaningful members.
Freemorphemes like town, dog can appear with other lexemes (as in town-hall or dog-house) or they can stand alone, or "free".