- rare
- adjective
1 not seen or found very often, or not happening very often: This species of plant is becoming increasingly rare. | We only went to the cinema on very rare occasions. | it is rare to do sth: It is rare to find such an interesting group of people. | it is rare for sb/sth to do sth: It's very rare for her to miss a day at school.2 meat that is rare has only been cooked for a short time and is still red: I like my steak rare.3 (only before noun) BrE old-fashioned unusually good or extreme: We had a rare old time at the party.4 air that is rare has less oxygen than usual because it is in a high place—see also: rarely, rarity — rareness noun (U) USAGE NOTE: RARE WORD CHOICE: rare, uncommon, scarce, infrequent, unusual, rarely, scarcely Things that do not exist in large numbers or amounts, are uncommon: an uncommon name/species of birds. Rare things are uncommon, and often valuable: a rare hand-crafted book cover | He collects rare coins. Things that you need and are difficult to find or get, though they may at other times be available, are scarce: Food is scarce in the refugee camps. | Parking spaces are scarce on Saturdays. Events that do not happen often are infrequent or rare: Opportunities for promotion are rare/infrequent in this company. | the infrequent letters from her son | the rare sight of a deer grazing It is unusual and rather formal to say: It is not rare to ... . People usually say uncommon or unusual or try to avoid using two negatives completely. For example, this sentence is perfectly acceptable: It's not unusual to see tears at a wedding . But you could say instead: You often see tears at a wedding. Rarely means 'not often' but scarcely means `hardly', or only `just': I rarely visit Houston (NOT scarcely, though you could say 'scarcely ever').| The train leaves in an hour - we've scarcely got time to pack.
Longman dictionary of contemporary English. 2004.