lose sleep over something Definition

lose
verb lost, losing

1a. To fail to keep or obtain something, especially because of a mistake, carelessness, etc;

Example: lost his money through a hole in his pocket
1b. To stop or begin to stop having (some distinguishing quality, characteristic or property);

Example: She was losing her nerve
Example: Despite everything, he hasn't lost his sense of humour
1c. To become less marked, noticeable, intense, etc in a specified way.

Example: These roses have lost their smell
2a. To misplace something, especially temporarily;

Example: I've lost the car keys
Thesaurus: misplace, mislay, forget; Antonym: find.
2b. To be unable to find something;
2c. To leave accidentally.

Example: I lost the umbrella at the cinema
3a. To suffer the loss of someone (usually a close friend or relative) through death;
3b. To suffer the loss of (an unborn baby) through miscarriage or stillbirth;
3c. To fail to save the life of (especially a patient);
3d. To be deprived of someone or something (life, possessions, etc), especially in a war, fire, natural disaster, etc;

Example: The village lost half its population in the earthquake
3e. To be killed or drowned, especially at sea.

Form: be lost
4. To fail to use or get something; to miss (an opportunity).

Thesaurus: miss, forfeit.
tr & intr
5a. To fail to win (a game, vote, proposal, election, battle, bet, etc);

Thesaurus: be defeated, fail, succumb; Antonym: win.
5b. To give away; to forfeit.

Example: lost £50 on the horses
6a. To be unable or no longer able to hear, see, understand, etc someone or something;

Example: Sorry, I lost what you said when that noisy bus went by
6b. To confuse or bewilder someone.

Example: Sorry, you've lost me there
7a. To escape or get away from someone or something;
7b. Said of a competitor in a race, etc: to leave (the rest of the field, etc) behind.
8. Said of a clock or watch: to become slow by (a specified amount).

Idiom: lose one's cool

colloq
To become upset.

Idiom: lose face

To be humiliated or discredited.

Idiom: lose one's grip (lose one's grip on something)

To be unable to control or understand things.

Idiom: lose ground

To slip back or behind.
Example: Major steadily lost ground in the opinion polls

Idiom: lose one's head

To become angry or irrational.

Idiom: lose heart

To become discouraged; to despair.

Idiom: lose one's heart (lose one's heart to someone)

To fall in love (with them).

Idiom: lose one's licence

To be disqualified from driving, usually for exceeding the limit of alcohol in the blood or for driving dangerously.

Idiom: lose one's marbles

slang
To go completely crazy.

Idiom: lose one's mind (lose one's reason)

To behave irrationally, especially temporarily.

Idiom: lose one's rag (lose the rag)

(rit)
colloq
To become very angry.

Idiom: lose sight of someone or something

To be unable or no longer able to see them or it.

To forget or ignore the importance of them or it.
Example: They lost sight of their original aims

Idiom: lose sleep over something

To worry about it or be preoccupied by it.

Idiom: lose one's temper

To become angry.

Idiom: lose one's touch

To forget how to do something; to be less proficient at doing something than one used to be.

Idiom: lose touch with someone or something

To no longer be in contact with them or it.

Idiom: lose track of someone or something

To fail to notice or monitor the passing or progress of them or it.

Idiom: lose one's voice

To be unable or hardly able to speak, especially due to having a sore throat, a cold or flu.

Idiom: lose one's way (lose the way)

To be unable or no longer able to tell where one is or in which direction one should be going; to stray from one's intended route by mistake.

Etymology: Anglo-Saxon losian to be lost.

Phrasal Verb: lose oneself in something

To have all of one's attention taken up by it.

Phrasal Verb: lose out

To suffer loss or be at a disadvantage.To fail to get something one wants.

Phrasal Verb: lose out on something

To fail to benefit from it.

Phrasal Verb: lose to someone

To be beaten by them.
Example: He lost to a more experienced player

Info:

A word often confused with this one is loose.

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sleep
noun

1. In humans and many animals: a readily reversible state of natural unconsciousness during which the body's functional powers are restored, and physical movements are minimal.
2. A period of such rest.

Thesaurus: rest, repose, shuteye (slang), forty winks (slang), nap, siesta.
3. colloq
Mucus that collects in the corners of the eyes during such rest.
4. poetic
Death.

verb, intr slept, sleeping

1. To rest in a state of sleep.

Thesaurus: slumber, doze, drowse, rest, nap, snore, turn in, hit the sack (slang), hit the hay (slang), nod off.
2. To be motionless, inactive or dormant.
tr
3. To provide or contain sleeping accommodation for (the specified number).

Example: The caravan sleeps four
4. colloq
To be in a dreamy state, not paying attention, etc.
5. poetic
To be dead.

Idiom: go to sleep

To pass into a state of sleep.

colloq
Said of a limb: to be temporarily numb through lack of blood circulation.

Idiom: lose sleep over something

colloq
Note: usually with negatives
To be worried or preoccupied by it.

Idiom: put someone or something to sleep

To anaesthetize them.

euphemistic
To kill (an animal) painlessly with an injected drug.

Etymology: Anglo-Saxon slæp.

Phrasal Verb: sleep around

To engage in casual sexual relations.

Phrasal Verb: sleep in

To sleep later than usual in the morning.To sleep overnight at one's place of work; to live in.

Phrasal Verb: sleep something off

To recover from it by sleeping.

Phrasal Verb: sleep on something

To delay taking a decision about it until the following morning in the hope that one might have a better intuitive feel for the best course of action.

Phrasal Verb: sleep out

To sleep out of doors.To sleep away from one's place of work; to live out.

Phrasal Verb: sleep with someone

To have sexual relations with them.