Longman Dictionary of Contemporary English homepage

fingertip

noun
     
Related topics: Human
fin‧ger‧tip [countable]
1HBH the end of your finger, that is furthest away from your hand:
She touched his cheek gently with her fingertips.
2

have something at your/their fingertips

to have knowledge or information ready and available to use very easily:
We have all the facts and figures at our fingertips.
3

to his/her fingertips

British English in all ways; completely:
She's British to her fingertips.

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