No exact matches for left back, but the following may be helpful.

leave¹ verb (left, leaving) 1 intrans to go away from someone or somewhere. 2 to allow something to remain behind, especially by mistake • left the keys at home. 3 to move out of somewhere. 4 to abandon. 5 intrans to resign or quit. 6 to allow someone or something to remain in a particular state or condition • leave the window open. 7 to deliver to or deposit with someone • I'll leave the keys with a neighbour. 8 to cause • It may leave a scar. 9 to have as a remainder • Three minus one leaves two. 10 to make a gift of something in a will • left all her money to charity. 11 to be survived by • leaves a wife and daughter. 12 to cause (especially food or drink) to remain unfinished • She left half her dinner. 13 to hand or turn something over to someone else • left the driving to her. be left with to be burdened with • He was left with a huge bill. leave someone or something be 1 to allow them or it to remain unchanged. 2 to leave them or it alone. leave for dead to abandon someone who is assumed to be dead. leave go colloq to let go. leave someone holding the baby to abandon them to an unpleasant task or fate. leave someone in the lurch see under lurch². leave it at that to take no further action, make no more comment on, etc. leave it out! slang stop it! leave little or much to be desired to be slightly or very inadequate or unsatisfactory. leave something unsaid to hold back from saying it. leave well alone to refrain from interfering with something, especially when it is functioning adequately.
ETYMOLOGY: Anglo-Saxon læfan to remain.

left¹ adj 1 referring, relating to, or indicating the side facing west from the point of view of someone or something facing north, which normally in human beings has the weaker and less skilful hand. 2 relatively liberal, democratic, progressive, innovative, either in general disposition or in political outlook. 3 inclined towards socialism or communism. adverb on or towards the left side. noun 1 the left side, part, direction, etc. 2 the region to the left side. 3 (the Left) a people, political parties, etc in favour of socialism; b the members of any political party that holds the most progressive, democratic, socialist, radical or actively innovating views
ETYMOLOGY: from the practice in some legislatures of this group sitting to the president's left See also right (noun 5), centre (noun 8). 4 the left hand • a boxer who leads with his left. 5 a blow with the left hand. 6 said of one of a pair: a glove, shoe, etc which fits the left hand or foot. 7 a turning to the left. have two left feet to be very awkward or clumsy, especially when trying to dance. left, right and centre in or from all directions; everywhere.
ETYMOLOGY: Anglo-Saxon left weak.

left² past tense, past participle of leave¹

Left Bank noun 1 traditionally the artistic and student quarter of Paris on the south side of the River Seine. 2 as adj (often left bank) having artistic, unconventional or eccentric ways • thinks of himself as very left bank.

left-footed adj 1 done with the left foot. 2 having more strength or skill in the left foot.

left-footer noun, Brit derog slang a Roman Catholic.
ETYMOLOGY: 1940s: originating in communal turf-cutting in Ulster, where, traditionally, the Roman Catholics would use spades with lugs to the left of the shaft, requiring them to use the left foot to push the spade into the turf, while Protestants used spades with lugs to the right.

left-hand adj 1 relating to, on or towards the left. 2 done with the left hand.

left-hand drive adj said of vehicles intended for use on the right-hand side of the road: having the driving mechanisms on the left.

left-handed adj 1 having the left hand stronger and more skilful than the right. 2 for use by left-handed people, or the left hand. 3 awkward; clumsy. 4 said of compliments, etc: dubious or ambiguous; only seeming to be sincere. 5 anti-clockwise. 6 said of a marriage: where one partner is of a considerably lower rank than the other and the marriage does not improve the lower-ranking person's status. Compare morganatic. left-handedly adverb. left-handedness noun.

left-hander noun 1 a left-handed person. 2 a punch with the left hand.

leftism noun 1 the principles and policies of the political left. 2 support for and promotion of this. leftist noun a supporter of the political left. adj relating to or characteristic of the political left.

left-luggage noun in an airport, railway or coach station: an area containing lockers where one can store luggage.

left-luggage office noun a room at an airport or a railway or coach station where travellers may leave luggage in return for a small payment.

left-of-centre adj in politics: inclining slightly towards a group's, a party's or a political system's more liberal policies. noun (left of centre) those in a group, party or political system that favour comparatively liberal policies or views. Compare right-of-centre.

left-over adj not used up, not eaten, etc • Put the left-over soup in the fridge. noun (leftovers) food that remains uneaten at the end of a meal • gave the leftovers to the dog.

left wing noun 1 the members of a political party or group who are most inclined towards a socialist viewpoint. 2 sport a the extreme left side of a pitch or team in a field game • took the ball down the left wing; b (also left-winger) a player playing on this side • The left wing scored a hat-trick. 3 the left side of an army. left-wing adj belonging or relating to the left wing. left-winger noun.

lefty noun (lefties) colloq, often derog 1 politics a left-winger. 2 a left-handed person.