diff --git a/lib/src/fnc/operate.rs b/lib/src/fnc/operate.rs
index 08ee5d2d..f10871a4 100644
--- a/lib/src/fnc/operate.rs
+++ b/lib/src/fnc/operate.rs
@@ -193,6 +193,13 @@ pub fn inside_none(a: &Value, b: &Value) -> Result<Value, Error> {
 	}
 }
 
+pub fn outside(a: &Value, b: &Value) -> Result<Value, Error> {
+	match a.intersects(b) {
+		true => Ok(Value::False),
+		false => Ok(Value::True),
+	}
+}
+
 pub fn intersects(a: &Value, b: &Value) -> Result<Value, Error> {
 	match a.intersects(b) {
 		true => Ok(Value::True),
diff --git a/lib/src/sql/expression.rs b/lib/src/sql/expression.rs
index 323ef5d6..e263aa19 100644
--- a/lib/src/sql/expression.rs
+++ b/lib/src/sql/expression.rs
@@ -109,6 +109,7 @@ impl Expression {
 			Operator::AllInside => fnc::operate::inside_all(&l, &r),
 			Operator::AnyInside => fnc::operate::inside_any(&l, &r),
 			Operator::NoneInside => fnc::operate::inside_none(&l, &r),
+			Operator::Outside => fnc::operate::outside(&l, &r),
 			Operator::Intersects => fnc::operate::intersects(&l, &r),
 			_ => unreachable!(),
 		}
diff --git a/lib/src/sql/operator.rs b/lib/src/sql/operator.rs
index ed5660d1..17776ed3 100644
--- a/lib/src/sql/operator.rs
+++ b/lib/src/sql/operator.rs
@@ -48,6 +48,7 @@ pub enum Operator {
 	AllInside,   // ⊆
 	AnyInside,   // ⊂
 	NoneInside,  // ⊄
+	Outside,     // ∈
 	Intersects,  // ∩
 }
 
@@ -106,6 +107,7 @@ impl fmt::Display for Operator {
 			Operator::AllInside => write!(f, "ALL INSIDE"),
 			Operator::AnyInside => write!(f, "ANY INSIDE"),
 			Operator::NoneInside => write!(f, "NONE INSIDE"),
+			Operator::Outside => write!(f, "OUTSIDE"),
 			Operator::Intersects => write!(f, "INTERSECTS"),
 		}
 	}
@@ -195,7 +197,7 @@ pub fn phrases(i: &str) -> IResult<&str, Operator> {
 			map(tag_no_case("NONE INSIDE"), |_| Operator::NoneInside),
 			map(tag_no_case("NOT INSIDE"), |_| Operator::NotInside),
 			map(tag_no_case("INSIDE"), |_| Operator::Inside),
-			map(tag_no_case("OUTSIDE"), |_| Operator::NotInside),
+			map(tag_no_case("OUTSIDE"), |_| Operator::Outside),
 			map(tag_no_case("INTERSECTS"), |_| Operator::Intersects),
 		)),
 	))(i)?;