hard Definition in Cambridge American English Dictionary
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Definition of "hard" - American English Dictionary

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hardadjective [-er/-est only]

 us   /hɑrd/

hard adjective [-er/-est only] (SOLID)

firm and solid, or not easy to bend, cut, or break: It hadn’t rained in a long time, and the ground was hard. He chewed on something hard and was afraid he’d broken a tooth.

hard adjective [-er/-est only] (DIFFICULT)

difficult to understand or do: hard questions to answer [+ to infinitive] It’s hard to say which of them is lying. It’s hard being a working mother. [+ to infinitive] Her handwriting is hard to read. She always does things the hard way (= makes things more difficult to do). I find her books hard going (= difficult and tiring).

hard adjective [-er/-est only] (USING EFFORT)

needing or using a lot of physical or mental effort: Qualifying as a surgeon is hard work. We had fun cycling, but it was hard to go up the hills.

hard adjective [-er/-est only] (SEVERE)

not pleasant or gentle; severe: She’s had a hard life. His boss is giving him a hard time (= is being unpleasant to him). Don’t be too hard on her – she’s just learning the job. Someone who is hard on a piece of clothing tends to damage it quickly: I’m very hard on shoes. If water is hard, it contains minerals (= chemical substances) that prevent soap from producing bubbles and cleaning easily.

hard adjective [-er/-est only] (DRUG)

(of a drug) dangerous and addictive (= giving you the habit of taking it), or (of a drink) containing a large amount of alcohol

hard adjective [-er/-est only] (BASED ON FACTS)

able to be proven: hard evidence

hardadverb [-er/-est only]

 us   /hɑrd/

hard adverb [-er/-est only] (WITH EFFORT)

with a lot of physical or mental effort: You have to push the door hard to open it. If something is hard-earned or hard-won, it was achieved only after a lot of effort: hard-earned money/knowledge/fame hard-won freedoms/battles

hard adverb [-er/-est only] (SEVERELY)

in a severe or forceful way: They took the defeat hard. It’s raining hard. She stepped on my toe really hard.
(Definition of hard from the Cambridge Academic Content Dictionary © Cambridge University Press)
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