▸ log in or log on PHRASAL VERB When someone logs in or logs on , or logs into a computer system, they start using the system, usually by typing their name or identity code and a password. □ [V P ] Customers pay to log on and gossip with other users. □ [V P n] They would log into their account and take a look at prices and decide what they'd like to do.
▸ log out or log off PHRASAL VERB When someone who is using a computer system logs out or logs off , they finish using the system by typing a particular command. □ [V P ] If a computer user fails to log off, the system is accessible to all.
logan|berry /loʊ gənbəri, [AM ] -beri/ (loganberries ) N‑COUNT A loganberry is a purplish red fruit that is similar to a raspberry.
loga|rithm /lɒ gər I ðəm, [AM ] lɔː g-/ (logarithms ) N‑COUNT In mathematics, the logarithm of a number is a number that it can be represented by in order to make a difficult multiplication or division sum simpler.
lo g book (log books ) N‑COUNT A log book is a book in which someone records details and events relating to something, for example a journey or period of their life, or a vehicle.
log|ger /lɒ gə r , [AM ] lɔː g-/ (loggers ) N‑COUNT A logger is a man whose job is to cut down trees. [AM ] in BRIT, use lumberjack
log|ger|heads /lɒ gə r hed, [AM ] lɔː g-/ PHRASE If two or more people or groups are at loggerheads , they disagree very strongly with each other. □ [+ over ] For months dentists and the health department have been at loggerheads over fees. □ [+ with ] He was at loggerheads with other members of the committee.
log|gia /lɒ dʒə/ (loggias ) N‑COUNT A loggia is a roofed area attached to a house. [FORMAL ]
log|ging /lɒ g I ŋ, [AM ] lɔː g-/ N‑UNCOUNT [oft N n] Logging is the activity of cutting down trees in order to sell the wood. □ Logging companies would have to leave a central area of the forest before the end of the year.
log|ic /lɒ dʒ I k/
1 N‑UNCOUNT Logic is a method of reasoning that involves a series of statements, each of which must be true if the statement before it is true. □ Students learn forensic medicine, philosophy and logic.
2 N‑UNCOUNT The logic of a conclusion or an argument is its quality of being correct and reasonable. □ [+ of ] I don't follow the logic of your argument. □ [+ in v-ing] There would be no logic in upsetting the agreements.
3 N‑UNCOUNT [oft adj N ] A particular kind of logic is the way of thinking and reasoning about things that is characteristic of a particular type of person or particular field of activity. □ The plan was based on sound commercial logic.
logi|cal /lɒ dʒ I k ə l/
1 ADJ [usu ADJ n] In a logical argument or method of reasoning, each step must be true if the step before it is true. □ Each logical step must be checked by other mathematicians. ● logi|cal|ly /lɒ dʒ I kli/ ADV [usu ADV with v] □ My professional training has taught me to look at things logically.
2 ADJ [usu ADJ n] The logical conclusion or result of a series of facts or events is the only one which can come from it, according to the rules of logic. □ If the climate gets drier, then the logical conclusion is that even more drought will occur. □ …a society that dismisses God as a logical impossibility. ● logi|cal|ly ADV [ADV with v] □ From that it followed logically that he would not be meeting Hildegarde.
3 ADJ Something that is logical seems reasonable or sensible in the circumstances. □ Connie suddenly struck her as a logical candidate. □ There was a logical explanation. □ [+ to-inf] It is logical to take precautions. ● logi|cal|ly ADV [ADV with v] □ I was surprised it was so different from France, though logically I shouldn't have been.
-logical → see -ological
lo g|ic bomb (logic bombs ) N‑COUNT A logic bomb is an unauthorized program that is inserted into a computer system so that when it is started it affects the operation of the computer. [COMPUTING ]
lo|gi|cian /lədʒ I ʃ ə n/ (logicians ) N‑COUNT A logician is a person who is a specialist in logic.
-logist → see -ologist
lo|gis|tic /lədʒ I st I k/ or logistical /lədʒ I st I k ə l/ ADJ [ADJ n] Logistic or logistical means relating to the organization of something complicated. □ Logistical problems may be causing the delay. □ She described the distribution of food and medical supplies as a logistical nightmare. ● lo|gis|ti|cal|ly /lədʒ I st I kli/ ADV [ADV adj, ADV with v] □ Organised junior football was either restricted or logistically impossible to operate. □ It is about time that the U.N. considers logistically deploying additional military resources. □ Logistically it is very difficult to value unit-linked policies.
lo|gis|tics /lədʒ I st I ks/ N‑UNCOUNT [with sing or pl verb] If you refer to the logistics of doing something complicated that involves a lot of people or equipment, you are referring to the skilful organization of it so that it can be done successfully and efficiently. □ [+ of ] The logistics of organising such a big show pose enormous practical problems.
log|jam /lɒ gdʒæm/ (logjams ) N‑COUNT [usu sing] To break the logjam means to change or deal with a difficult situation which has existed for a long time. [JOURNALISM ] □ A new initiative was needed to break the logjam.
logo /loʊ goʊ/ (logos ) N‑COUNT The logo of a company or organization is the special design or way of writing its name that it puts on all its products, notepaper, or advertisements.
-logy → see -ology
loin /lɔ I n/ (loins )
1 N‑PLURAL Someone's loins are the front part of their body between their waist and legs, especially their sexual parts. [LITERARY , OLD-FASHIONED ]