Meaning of USEFUL in English

USEFUL

ˈyüsfəl adjective

Etymology: use (I) + -ful

: capable of being put to use : having utility : advantageous

the Communists find him just as useful as an opponent — Time

especially : producing or having the power to produce good : serviceable for a beneficial end or object

all sorts of useful implements such as axes, chisels, gouges, arrowheads — American Guide Series: Rhode Island

useful to remind ourselves occasionally of our limitations

no useful rain had fallen for five or six months — Sydney (Australia) Bulletin

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.