WordNet sense 1 (not brought to an end or conclusion):

unfinished

WordNet sense 2 (not caught or not caught within bounds):

uncompleted

WordNet sense 3 (giving only major points; lacking completeness):

sketchy

WordNet sense 4 (being in the earliest stages of development):

rudimentary

WordNet sense 5 (being or affecting only a part; not total):

partial

WordNet sense 6 (lacking a part or parts):

broken

WordNet sense 7 (not complete or total; not completed):

uncomplete