Sentence:  An idea , of the sort that we have in mind , although of necessity readily available to imagination , <WSD>is</WSD> more general in connotation than most poetic or literary images , especially those appearing in lyric poems that seek to capture a moment of personal experience . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)