From Longman Dictionary of Contemporary Englishopportunistop‧por‧tun‧ist /ˌɒpəˈtjuːnɪst $ ˌɑːpərˈtuː-/ noun [countable]1CHANCE/OPPORTUNITYsomeone who uses every opportunity to gain power, money, or unfairadvantages – used to show disapprovalVoters dislike opportunists – politicians who change their policies according to opinion polls.2CRIMEsomeone who commits a crime because they have a chance to, and not because they planned toMost burglars are opportunists.an opportunist crime —opportunist adjectivethe opportunist policies of wartime leaders —opportunistic /ˌɒpətjuːˈnɪstɪk◂ $ ˌɑːpərtuː-/ adjectiveopportunistic thefts from cars
Examples from the Corpus
opportunist• It is difficult to tell whether he really wants to help May or whether he is just an opportunist.• Some of the crime is committed by opportunists who wander into students rooms and take cash and creditcards.• As the finance company started to fail a few opportunistsmanaged to make more money out of it.• The herringgulls are localresidentbirds, and great opportunists, able to change their feedinghabits to whatever is available.• The ships have gone and so has the Black Rat, but the opportunistBrown Rat remains a threat ashore.• There are basically two types of thief: the opportunist and the pro.• The woman I had spoken with was directly responsible for deciding what the opportunist was paid.• The opportunist was told what he deserved to know: nothing.• The opportunist, too, deserved applause.• an unethicalopportunistFrom Longman Business Dictionaryopportunistop‧por‧tun‧ist /ˌɒpəˈtjuːnəstˌɑːpərˈtuː-/ noun [countable]a person or organization that is willing to use every chance to gain an advantage or make moneyThese companies represent a growing band of economic opportunists - they move with lightning speed whenever an opportunity opens. —opportunistic adjectiveWe’re a very opportunistic company, continually looking to strengthen ourselves strategically in individual market segments. —opportunistically adverbWe’re learning how to sell much more opportunistically.