Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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Children's Dictionary
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keep an eye on to watch or tend with care.
keep one's shirt on (informal) to stop oneself from becoming angry or losing patience; hold one's temper.
keep tabs on (informal) to keep under close watch; observe carefully.
live high on the hog to live in a way that shows that you spend a lot of money.
log on to enter a computer system with a password.
make one's hair stand on end to make very frightened.
move on to change to a new place, position, or subject.
on a dime (informal) with great quickness or accuracy.
on account of because of.
on an even keel in balance or stable.
on and on for too long a time.
on deck next in line to bat in a baseball game.
on edge nervous or anxious; full of worry.
on foot by walking.
on guard alert and prepared.
on hand ready right there.
on last legs having very little energy, strength, hope, or ability to go on; likely to collapse or die.
on occasion now and then; irregularly.
on one's toes (informal) alert and ready to act.
on purpose not by accident; deliberately.