demarcate

de·mar·cate  (d-märkt, dmär-kt)

tr.v. de·mar·cat·ed, de·mar·cat·ing, de·mar·cates

1. To set the boundaries of; delimit.

2. To separate clearly as if by boundaries; distinguish: demarcate categories.

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[Back-formation from demarcation.]

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de·marcator n.

Thesaurus

Verb	1.	demarcate - separate clearly, as if by boundaries differentiate, distinguish, secern, secernate, severalise, severalize, tell apart, separate, tell - mark as different; "We distinguish several kinds of maple"
	2.	demarcate - set, mark, or draw the boundaries of something delimitate, delimit circumscribe, confine, limit - restrict or confine, "I limit you to two visits to the pub a day"