Sentence:  Or , equally often , a concretistic seeming , particularistic seeming statement may consist , with its mundane exterior , in a form of poetry - may be full of meaning and emotion when interpreted as a figurative expression : a <WSD>metaphor</WSD> , a simile , an allegory , or some other symbolic mode of speaking . 
Meaning of the word marked with <WSD> tags:  a figure of speech in which an expression is used to refer to something that it does not literally denote in order to suggest a similarity