Oxford Advanced American Dictionary

Definition of bag noun from the Oxford Advanced Learner's Dictionary

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bag

noun
bag pronunciation English bæɡ bag pronunciation American bæɡ
 
 

container

1 [countable] (often in compounds) a container made of paper or plastic, that opens at the top, used especially in shops/storesa plastic/polythene/paper baga laundry/mail baga black plastic rubbish/garbage bag2 [countable] a strong container made from cloth, plastic, leather, etc, usually with one or two handles, used to carry things in when shopping or travellinga shopping baga make-up bagHe's upstairs unpacking his bags.She opened her bag (= her handbag ) and took out her comb. see also airbag, beanbag, bumbag, goody bag, punchbag, sandbag, tea bag
 

amount

3 [countable] bag (of something) the amount contained in a bagShe ate a bag of chips.4 bags [uncountable, plural] bag (of something) (British English, informal) a large amount or a large number of somethingGet in! There's bags of room.
 

under eyes

5 bags [plural] dark circles or loose folds of skin under the eyes, as a result of getting old or lack of sleep
 

unpleasant woman

6 [countable] (informal, especially British English) an insulting word for an unpleasant or bad-tempered older woman see also ratbag, scumbag, windbag
 

birds/animals

7 [countable, usually singular] all the birds, animals, etc. shot or caught on one occasionWe got a good bag today.
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There are many other compounds ending in bag. You will find them at their place in the alphabet.
Idioms

bag and baggage

with all your possessions, especially secretly or suddenly
He threw her out onto the street, bag and baggage.

a bag of bones

(informal) a very thin person or animalThe cat hadn't been fed for weeks and was just a bag of bones.

be in the bag

(informal) if something is in the bag, it is almost certain to be won or achieved

leave somebody holding the bag

(North American English, informal) to suddenly make somebody responsible for something important, such as finishing a difficult job, that is really your responsibilityYou two were going to fly off and leave me holding the bag.

(not) somebody's bag

(informal) (not) something that you are interested in or good atPoetry isn't really my bag.
more at let the cat out of the bag at cat, be a bag/bundle of nerves at nerve noun
Idioms
see
pack your bags at pack verb
, a bag/box of tricks at trick noun