"Most lineate" refers to something that is highly defined or characterized by clear lines or boundaries. Some synonyms for this term include "precisely delineated," "sharply demarcated," "distinctly bordered," "crisply outlined," and "cleanly delimitated." Other options might include "neatly separated," "clearly delimited," or "pristinely defined." Whatever the specific word chosen, the overall implication is of something that is very defined and easy to distinguish from its surroundings. This can apply to many different contexts, from artistic works to scientific diagrams to business plans and beyond. As such, having a range of synonyms available can help to add nuance and specificity to one's language.