diff --git a/core-groovy-2/README.md b/core-groovy-2/README.md
new file mode 100644
index 0000000000..0aed5602ab
--- /dev/null
+++ b/core-groovy-2/README.md
@@ -0,0 +1,5 @@
+# Groovy
+
+## Relevant articles:
+
+- [Groovy def Keyword]
diff --git a/core-groovy-2/pom.xml b/core-groovy-2/pom.xml
new file mode 100644
index 0000000000..68382e613b
--- /dev/null
+++ b/core-groovy-2/pom.xml
@@ -0,0 +1,123 @@
+
+
+ 4.0.0
+ core-groovy-2
+ 1.0-SNAPSHOT
+ core-groovy-2
+ jar
+
+
+ com.baeldung
+ parent-modules
+ 1.0.0-SNAPSHOT
+
+
+
+
+ org.codehaus.groovy
+ groovy
+ ${groovy.version}
+
+
+ org.codehaus.groovy
+ groovy-all
+ ${groovy-all.version}
+ pom
+
+
+ org.codehaus.groovy
+ groovy-dateutil
+ ${groovy.version}
+
+
+ org.codehaus.groovy
+ groovy-sql
+ ${groovy-sql.version}
+
+
+ org.junit.platform
+ junit-platform-runner
+ ${junit.platform.version}
+ test
+
+
+ org.hsqldb
+ hsqldb
+ ${hsqldb.version}
+ test
+
+
+ org.spockframework
+ spock-core
+ ${spock-core.version}
+ test
+
+
+
+
+
+
+ org.codehaus.gmavenplus
+ gmavenplus-plugin
+ ${gmavenplus-plugin.version}
+
+
+
+ addSources
+ addTestSources
+ compile
+ compileTests
+
+
+
+
+
+ maven-failsafe-plugin
+ ${maven-failsafe-plugin.version}
+
+
+ org.junit.platform
+ junit-platform-surefire-provider
+ ${junit.platform.version}
+
+
+
+
+ junit5
+
+ integration-test
+ verify
+
+
+
+ **/*Test5.java
+
+
+
+
+
+
+
+
+
+
+ central
+ http://jcenter.bintray.com
+
+
+
+
+ 1.0.0
+
+
+
+ 2.5.6
+ 2.5.6
+ 2.5.6
+ 2.4.0
+ 1.1-groovy-2.4
+ 1.6
+
+
+
diff --git a/core-groovy-2/src/test/groovy/com/baeldung/defkeyword/DefUnitTest.groovy b/core-groovy-2/src/test/groovy/com/baeldung/defkeyword/DefUnitTest.groovy
new file mode 100644
index 0000000000..baab7455a5
--- /dev/null
+++ b/core-groovy-2/src/test/groovy/com/baeldung/defkeyword/DefUnitTest.groovy
@@ -0,0 +1,73 @@
+package com.baeldung.defkeyword
+
+import org.codehaus.groovy.runtime.NullObject
+import org.codehaus.groovy.runtime.typehandling.GroovyCastException
+
+import groovy.transform.TypeChecked
+import groovy.transform.TypeCheckingMode
+
+@TypeChecked
+class DefUnitTest extends GroovyTestCase {
+
+ def id
+ def firstName = "Samwell"
+ def listOfCountries = ['USA', 'UK', 'FRANCE', 'INDIA']
+
+ @TypeChecked(TypeCheckingMode.SKIP)
+ def multiply(x, y) {
+ return x*y
+ }
+
+ @TypeChecked(TypeCheckingMode.SKIP)
+ void testDef() {
+
+ def list
+ assert list.getClass() == org.codehaus.groovy.runtime.NullObject
+ assert list.is(null)
+
+ list = [1,2,4]
+ assert list instanceof ArrayList
+
+ int sum = 200
+ try {
+ sum = [12] //GroovyCastException
+ sum = "nill" //GroovyCastException
+ } catch(GroovyCastException) {
+ println "Cannot assign anything other than integer"
+ }
+
+ def rate
+ assert rate == null
+ assert rate.getClass() == org.codehaus.groovy.runtime.NullObject
+
+ rate = 12
+ assert rate instanceof Integer
+
+ rate = "Not Available"
+ assert rate instanceof String
+
+ rate = [1, 4]
+ assert rate instanceof List
+
+ assert divide(12, 3) instanceof BigDecimal
+ assert divide(1, 0) instanceof String
+
+ }
+
+ def divide(int x, int y) {
+ if(y==0) {
+ return "Should not divide by 0"
+ } else {
+ return x/y
+ }
+ }
+
+ def greetMsg() {
+ println "Hello! I am Groovy"
+ }
+
+ void testDefVsType() {
+ def int count
+ assert count instanceof Integer
+ }
+}
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index bdd8403231..8746f8492b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -376,6 +376,7 @@
cdi
checker-plugin
core-groovy
+ core-groovy-2
@@ -1034,6 +1035,7 @@
cdi
checker-plugin
core-groovy
+ core-groovy-2
core-java-8