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mount (something) on (something else)
To set or affix something at a higher position on something else. I was going to mount the new TV on the wall, but I actually prefer it on the table where it is now. The soldier mounted the machine gun on the rampart in preparation of the invading forces.
mount against (someone or something)
1. To gain in scale, scope, or strength in opposition to someone or something. The evidence has continued to mount against the disgraced CEO ever since the first allegations of fraud surfaced over a month ago. A rebel insurgency has begun mounting against he tyrant king.
2. To instigate, prepare, or set in motion some action or movement in opposition to someone or something. We're mounting a counter-offensive against the enemy's position in Normandy. The prosecution has mounted an aggressive and airtight case against the defendant.
See also: mount
To watch over someone or something; to act as a guard or a lookout for someone or something. He mounted guard outside the bathroom to make sure no one walked in on Jeremy getting sick. The police are mounting guard around the prison, lest the prisoner should attempt escape a second time.
To try to stop or keep something from happening. I'm worried that the townspeople are going to mount resistance once they learn that yet another tax has been levied against them.
1. To get up on and sit into the mount (saddle) of a horse. Don't feel bad—I've been riding horses for a few years, and I still have trouble mounting up. OK, campers—pack up your gear and mount up! It's time to head out.
2. To increase in size, amount, scope, or intensity. As the pressures of managing the company continued mounting up, Martin found it harder and harder to cope. If these costs keep mounting up, I don't know how we'll be able to keep the business running.
3. To set or affix something at a higher position (on something else). In this usage, a noun or pronoun can be used between "mount" and "up." I was going to mount the new TV up on the wall, but I actually prefer it on the table where it is now. The soldier mounted up the machine gun on the rampart in preparation of the invading forces.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
1. to get up on a horse. Mount up and let's get out of here! Please mount up so we can leave.
2. [for something] to increase in amount or extent. Expenses really mount up when you travel. Medical expenses mount up very fast when you're in the hospital.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.