What's the difference between cellar and underkeep?

Cellar

Definition:

(n.) A room or rooms under a building, and usually below the surface of the ground, where provisions and other stores are kept.

Example Sentences:

(1) Shackles were found in the cellar, and yesterday police found a trap door.
(2) Last Friday evening, ahead of the congress, the politicians gathered with 100 guests for a dinner in the vaulted cellar of a castle, Burg Weisenau, in the nearby city of Mainz.
(3) It was happening in the cellars of Paris during the occupation in terms of jazz records.
(4) From six captures of Drosophila melanogaster carried out in three different habitats (cellar, vineyard, and pinewood) in two different seasons of the year (spring and autumn), 60 eye-colour mutations were isolated, which were reduced to 29 loci by means of allelism tests within and between populations.
(5) In Walsden, Abbi Blackburn was left stranded in her home after five feet of water poured into her cellar.
(6) Marshall has also established that the cellars regularly flooded disastrously: he began his own work in the building standing in a foot of foetid water.
(7) The EU has so far insisted that the UK cannot offset its share of European Union assets, such as buildings, or indeed the commission’s generous wine cellar, from the bill.
(8) Hence Riva's ordeal in the bathroom, and another almost unwatchable moment that corresponds to the revelation of Mrs Bates rotting in the fruit cellar.
(9) You will never see cream in my house that is not in a jug, nor salt that is not in a cellar.
(10) The cellar level is on the average 5.4 times higher if the cellar has partially a gravel or earth floor than if the whole cellar surface is covered with a concrete floor.
(11) A staircase descends steeply into a network of tunnels and cellars that lead to extraordinary old chalk pits.
(12) The air breathed by three cellar workers was monitored continuously during working hours for one wk.
(13) On the current track, maybe life does become unbearable in the future, when the last remaining cubic centimetre of public space – a trembling pocket of air perhaps, in a cellar at the Emirates British Library – is finally acquired by a friend of King Charles III.
(14) More sybaritically, there is a wine cellar, and a tunnel to the Mandarin Oriental through which meals can be served.
(15) A total number of nearly 100 houses were investigated in Angera; the highest radon concentrations were observed in cellars and especially in the areas where fractures are bigger and more diffuse.
(16) This government was right to examine quangos: if we can't afford universal child benefit, we can't afford committees advising on what wine to buy for government cellars (although if governments want drinks parties, somebody must buy drink).
(17) As well as outlining the property bought in each case, each lease document also specifies which area of the development's wine cellar the buyer is entitled to.
(18) Elsewhere in town, I was reviewing a young double-act called Mitchell and Webb, and – performing in a cellar – a promising character comic, Catherine Tate.
(19) 6.4.1994 Emmerdale ablaze When someone points to a box of fireworks and says, "They should be in the cellar", you know the whole place is about to go up in a dazzling racket of rockets.
(20) I found a section on shocking revenge acts – like kidnapping the son of a mafioso, keeping him hostage in a cellar for two years, then strangling him.