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* 予定 (Yotei) is [defined](https://www.tanoshiijapanese.com/dictionary/index.cfm?j=yotei) as plans; 
  * 計画 (keikaku) is also [defined](https://www.tanoshiijapanese.com/dictionary/index.cfm?j=keikaku) as plans

Please could you explain the difference by explicitly making reference to the
following examples:

Example 1:

```

    Kyuuka no yotei wa arimasuka?
    (What are your vacation plans?)
    
```

Example 2:

```

    Mada ryokou no keikaku wa arimasen.
    I have no travel plans yet.
    
```

Please keep your explanation relatively simple as I am a beginner. Please
could you make reference to the above examples.

Please also explain a general rule for knowing when to use one over the other.
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question
word-choice
What's the difference between 予定 (Yotei) and 計画 (keikaku)?
This is not necessarily an easy question to answer because of the wide range
of meanings 'plan' has in English, but I will try in any case!

For me, 予定 is something that you (strongly) intend to do, and likely have made
arrangements for too. Looking at the kanji might help here: 予 imparts the
meaning of 'beforehand', and 定 imparts the meaning of 'determine' or 'fix'. So
this is something that is "determined beforehand". So, it can sometimes also
be translated as 'schedule' or 'arrangements'.

On the other hand, 計画 is more of a plan in the sense of a design, or a
strategy. In my mind, 計画 typically involves some thought process. I think it
can be distinguished from 予定, in that 計画 has an underlying goal or aim, and so
often lays out a set of actions to achieve something.

Examples of 予定：

> 今晩は何も予定がない。 I have no plans (I'll be free) this evening.
>
> 今日の予定 Today's schedule.
>
> 工事が予定されています。 Construction work has been scheduled. (i.e. a date has been
> set)

Example of 計画：

> 販売計画 A sales plan
>
> 暴力団は強盗を計画していた。 The gang was planning a robbery.
>
> その計画について相談しよう。 Let's discuss that plan.

Looking at your examples:

> 休暇の予定がありますか。has for me a meaning of
>
> _What do you intend to do on your holidays; have you made arrangements yet?_

On the other hand:

> まだ旅行の計画はありません。 has for me a meaning of
>
> _I haven't yet started to plan (design) a trip._
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answer