preposition | adverb
underunder1 /ˈʌndɚ/ ●●● S1 W1 preposition 1
directly below something, or covered by it SYN underneath OPP over: He has a small scar under his nose. I could see something shiny under the water. “Where’s the cat?” “She crawled under the couch.”2passing beneath something at one side and coming out at the other side OPP over: We sailed under the bridge.3less than a particular number, amount, age, or price OPP over: What can I buy for under ten dollars? toys for kids under age five4controlled by a particular leader, government, system, etc.: Under Schaefer’s leadership, the downtown area has been rebuilt.5experiencing or affected by a particular action: under discussion/consideration/review Three sites are under consideration for the new factory. Goodell is under attack (=being criticized) for his recent remarks. The road is still under construction (=being built).6experiencing or affected by a particular feeling, condition, substance, etc.: I’ve been under a lot of stress lately. She managed to keep her temper under control.under the influence of alcohol/drugs He was arrested for driving under the influence of alcohol.7under somebody’s control/influence/thumb etc. controlled or influenced by someone: Those who came under John’s spell did anything he asked.8if you are under someone at your job, you have a lower position and he or she helps to direct your work OPP over: the soldiers under his command9according to a particular agreement, law, etc.: Is this type of trade illegal under international law?10be under anesthesia/sedation/treatment etc. to be treated by a doctor using a particular drug or method: Daniels is under treatment at a psychiatric hospital.11used for saying in which part of a book, list, or system particular information can be found: The information is filed under the child’s last name.12if you write or do something under another name, you do it using a name that is not your real name [Origin: Old English] → see also be under the impression (that) at impression (2) preposition | adverb
underunder2 ●●● S2 adverb 1in or to a place that is below something or covered by it: He dived into the water and stayed under for a minute.2less in age, number, amount, etc. than the age, number, etc. mentioned: Children twelve and under must be accompanied by an adult.3in or into an unconscious condition because a doctor has given you drugs before surgery → see also put somebody under at put