half

1 half /ˈhæf/ Brit /ˈhɑːf/ noun
plural halves /ˈhævz/ Brit /ˈhɑːvz/
1 half
/ˈhæf/ Brit /ˈhɑːf/
noun
plural halves /ˈhævz/ Brit /ˈhɑːvz/
Britannica Dictionary definition of HALF
1 
: one of two equal or nearly equal parts into which something can be divided
[count]
[noncount]
— see also better half, other half
2 
a  [count] : either of the two equal periods of playing time in sports like football and basketball
b  the half : the time when the first half of a game ends
3 
[count] British, informal : half a pint of a drink (such as beer)

and a half

1 
— used in measurements of time, distance, weight, etc., to indicate one half of the unit of measurement
2 
informal — used to say that something is very good, large, difficult, etc.

by halves

informal
: in an incomplete way — used in negative statements to say that someone does things with a lot of energy and effort

go halves

also go half and half
: to share the cost of something equally

in half

: into two equal parts : into two halves

the half of it

informal
— used to say that a situation is even worse than you think it is or than it seems to be

too…by half

chiefly British, informal
— used to say that someone or something has too much of a particular quality usually in a way that is annoying
2 half /ˈhæf/ Brit /ˈhɑːf/ pronoun
2 half
/ˈhæf/ Brit /ˈhɑːf/
pronoun
Britannica Dictionary definition of HALF
: a number or amount that is equal to one half of a total

half the battle

— see 1battle

have half a mind

— see 1mind
3 half /ˈhæf/ Brit /ˈhɑːf/ adjective
3 half
/ˈhæf/ Brit /ˈhɑːf/
adjective
Britannica Dictionary definition of HALF
always used before a noun
1 
: equal or nearly equal in size, value, amount, etc., to one half of something
— see also half hour, half price
2 
: not complete : partial — often used in combination
4 half /ˈhæf/ Brit /ˈhɑːf/ adverb
4 half
/ˈhæf/ Brit /ˈhɑːf/
adverb
Britannica Dictionary definition of HALF
1 
: to an extent that is equal or nearly equal to half of something
2 
: not completely : to some degree : partially

half again as much/many (etc.) as

(US) or British half as much/many (etc.) again as
— used to say that the size or amount of one thing is 50 percent more than another

half as big/much/good (etc.) as

— used to say that the size, amount, or quality of one thing is half or nearly half that of another

half off

— used to say that something is being sold at half the original price

not half

1 
: not nearly
2 
British, informal — used to emphasize a statement or description

not half bad

informal
: surprisingly good