**To list your device definitions** The following ``list-device-definitions`` example displays details about the device definitions in your AWS account in the specified AWS Region. :: aws greengrass list-device-definitions \ --region us-west-2 Output:: { "Definitions": [ { "LatestVersionArn": "arn:aws:greengrass:us-west-2:123456789012:/greengrass/definition/devices/50f3274c-3f0a-4f57-b114-6f46085281ab/versions/c777b0f5-1059-449b-beaa-f003ebc56c34", "LastUpdatedTimestamp": "2019-06-14T15:42:09.059Z", "LatestVersion": "c777b0f5-1059-449b-beaa-f003ebc56c34", "CreationTimestamp": "2019-06-14T15:42:09.059Z", "Id": "50f3274c-3f0a-4f57-b114-6f46085281ab", "Arn": "arn:aws:greengrass:us-west-2:123456789012:/greengrass/definition/devices/50f3274c-3f0a-4f57-b114-6f46085281ab" }, { "LatestVersionArn": "arn:aws:greengrass:us-west-2:123456789012:/greengrass/definition/devices/e01951c9-6134-479a-969a-1a15cac11c40/versions/514d57aa-4ee6-401c-9fac-938a9f7a51e5", "Name": "TestDeviceDefinition", "LastUpdatedTimestamp": "2019-04-16T23:17:43.245Z", "LatestVersion": "514d57aa-4ee6-401c-9fac-938a9f7a51e5", "CreationTimestamp": "2019-04-16T23:17:43.245Z", "Id": "e01951c9-6134-479a-969a-1a15cac11c40", "Arn": "arn:aws:greengrass:us-west-2:123456789012:/greengrass/definition/devices/e01951c9-6134-479a-969a-1a15cac11c40" }, { "LatestVersionArn": "arn:aws:greengrass:us-west-2:123456789012:/greengrass/definition/devices/f9ba083d-5ad4-4534-9f86-026a45df1ccd/versions/83c13984-6fed-447e-84d5-5b8aa45d5f71", "Name": "TemperatureSensors", "LastUpdatedTimestamp": "2019-09-10T00:19:03.698Z", "LatestVersion": "83c13984-6fed-447e-84d5-5b8aa45d5f71", "CreationTimestamp": "2019-09-11T00:11:06.197Z", "Id": "f9ba083d-5ad4-4534-9f86-026a45df1ccd", "Arn": "arn:aws:greengrass:us-west-2:123456789012:/greengrass/definition/devices/f9ba083d-5ad4-4534-9f86-026a45df1ccd" } ] }