time of life ti·meof·life uncommon noun 1. a period of time during which a person is normally in a particular life state Synonymstime of life Related words Broader terms time period Narrower terms ageneonatal periodinfancychildhoodschooldaysyouthadolescenceprepuberty Parts life WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.