Collocations as natural combination of words help learners understand and express finer shades of meaning more successfully and reduce the cognitive load of having to build up messages from scratch. Besides, they allow speakers to express themselves more precisely instead of sounding wordy and blur the traditional division between the lexical and grammatical systems, which facilitate language learning and make communication more effective. Collocations are part of native speakers’ lexical competence and so that they might go unnoticed by English as a foreign language or English as a lingua franca learners especially in monolingual settings. This lack of awareness of collocations may cause their teaching to be neglected. A mixed approach research done with 20 students of Business English showed that vocabulary learning is facilitated when taught through collocations rather than through definitions of isolated words. Two tests, four tasks, a questionnaire and an interview were used. The tests and tasks revealed that students could recognize, understand and produce collocations in written texts better than isolated words. The questionnaire and interview indicated that students found it important to know the definition of words in order to learn them, but that it was easier to learn course vocabulary by means of collocations as they could learn both meaning and longer expressions.