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da |ta min|ing N‑UNCOUNT Data mining involves collecting information from data stored in a database, for example in order to find out about people's shopping habits. [COMPUTING ] □  Data mining is used to analyse individuals' buying habits.

da |ta pro |cess|ing N‑UNCOUNT Data processing is the series of operations that are carried out on data, especially by computers, in order to present, interpret, or obtain information. □  Taylor's company makes data-processing systems.

date ◆◆◇ /de I t/ (dates , dating , dated )

1 N‑COUNT A date is a specific time that can be named, for example a particular day or a particular year. □  What's the date today? □  You will need to give the dates you wish to stay and the number of rooms you require.

2 VERB If you date something, you give or discover the date when it was made or when it began. □ [V n] I think we can date the decline of Western Civilization quite precisely. □ [V n + to ] Archaeologists have dated the fort to the reign of Emperor Antoninus Pius.

3 VERB When you date something such as a letter or a cheque, you write that day's date on it. □ [V n] Once the decision is reached, he can date and sign the sheet. □ [V -ed] The letter is dated 2 July 1993.

4 N‑SING [at N ] If you want to refer to an event without saying exactly when it will happen or when it happened, you can say that it will happen or happened at some date in the future or past. □  Retain copies of all correspondence, since you may need them at a later date.

5 PHRASE To date means up until the present time. □  'Dottie' is by far his best novel to date.

6 VERB If something dates , it goes out of fashion and becomes unacceptable to modern tastes. □ [V ] A black coat always looks smart and will never date.

7 VERB If your ideas, what you say, or the things that you like or can remember date you, they show that you are quite old or older than the people you are with. □ [V n] It's going to date me now. I attended that school from 1969 to 1972.

8 N‑COUNT A date is an appointment to meet someone or go out with them, especially someone with whom you are having, or may soon have, a romantic relationship. □  I have a date with Bob.

9 N‑COUNT [usu poss N ] If you have a date with someone with whom you are having, or may soon have, a romantic relationship, you can refer to that person as your date . □  He lied to Essie, saying his date was one of the girls in the show.

10 VERB If you are dating someone, you go out with them regularly because you are having, or may soon have, a romantic relationship with them. You can also say that two people are dating . □ [V n] For a year I dated a woman who was a research assistant. □ [V ] They've been dating for three months.

11 N‑COUNT A date is a small, dark-brown, sticky fruit with a stone inside. Dates grow on palm trees in hot countries.

12 → see also blind date , carbon dating , dated , out of date , up-to-date

▸  date back PHRASAL VERB If something dates back to a particular time, it started or was made at that time. □ [V P + to ] …a palace dating back to the 16th century. □ [V P amount] This tradition dates back over 200 years.

▸  date from PHRASAL VERB If something dates from a particular time, it started or was made at that time. □ [V P n] The present controversy dates from 2016.

dat|ed /de I t I d/ ADJ Dated things seem old-fashioned, although they may once have been fashionable or modern. □  …people in dated dinner-jackets.

da te of bi rth (dates of birth ) N‑COUNT [oft poss N ] Your date of birth is the exact date on which you were born, including the year. □  The registration form showed his date of birth as August 2, 1979.