Synonym: advantageous, beneficial, functional, handy, helpful, practical, serviceable, valuable. Similar words: be useful to, purposeful, purposefully, careful, doleful, forceful, hopeful, grateful. Meaning: ['juːsfʊl] 
adj. 1. being of use or service 2. having a useful function.
adj. 1. being of use or service 2. having a useful function. 
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(121) Over the next few days, we fine-tuned the scheme and made some useful improvements.
(122) It is often useful to make a comparison between two things.
(123) She told him to get off his butt and do something useful.
(124) A laptop would be really useful for when I'm working on the train.
(125) His sense of humour was a useful buffer when things were going badly for him.
(126) The spacecraft is nearing the end of its useful life .
(127) A secretary would be a welcome/useful addition to our staff.
(128) It is most gratifying for me to know that my work has been useful.
(129) Television is useful for making up your mind how to vote.
(130) After a brief season of useful labour there,she fell asleep in Jesus,lamented by all who knew her.
(131) He argued that unemployment created a useful reserve army of labour.
(132) There's a lot of useful information on the countries in the world at the back of the dictionary.
(133) There is a lot of useful information at the back of this dictionary.
(134) The TV documentary served as a useful starting point for our discussion.
(135) Going to be a useful boy , so long as you use your loaf.
(136) Most humans only use a fraction of their total useful brainpower.
(137) All of these are quite useful breeds whose potentiality has not been realised.
(138) Chemicals in the body break our food down into useful substances.
(139) I've found a really useful website about allergies on the Net.
(140) The videotape would have been useful to establish alibis for the defendants.
(141) As far as I can judge,(http://sentencedict.com/useful.html) this book is useful.
(142) You should keep that paint - it might come in useful one day.
(143) It is not always helpful to draw analogies between sexism and racism, but in this instance it is useful.
(144) We need to find a useful role for the volunteers in the campaign.
(145) She couldn't bear to throw away anything that might come in useful one day.
(146) There is a useful bibliography at the end of each chapter.
(147) This booklet gives some useful pointers on what to expect when you arrive.
(148) If this allegation is true, it will give us a useful lever against him.
(149) He could always do something useful instead of wasting my time with footling queries.
(150) The accommodation is some distance from the clubhouse, so a hire car comes in useful.
More similar words: be useful to, purposeful, purposefully, careful, doleful, forceful, hopeful, grateful, ruefully, be full of, to the full, carefully, graceful, hopefully, resourceful, gracefulness, make full use of, lose face, refuse, defuse, refuge, beef up, refute, refund, defunct, refugee, befuddle, full, befuddled, make fun of.