1) Be opposite to 2) Bound 3) Define 4) Delimitate 5) Delineate 6) Demarcate 7) Establish boundaries 8) French word used in English 9) Mark the boundaries of 10) Put boundaries on 11) Separate into fields 12) Set boundaries 13) Set bounds for 14) Set the boundaries of 15) Specify 16) To demarcate 17) To mark or fix the limits of Found on https://www.crosswordclues.com/clue/delimit
De·lim'it transitive verb [ Latin delimitare : confer French délimiter .] To fix the limits of; to demarcate; to bound. Found on http://www.encyclo.co.uk/webster/D/29